diff --git a/admin/package-lock.json b/admin/package-lock.json
index 1baf4ca..7da0990 100644
--- a/admin/package-lock.json
+++ b/admin/package-lock.json
@@ -8,6 +8,7 @@
       "name": "nestquest-admin",
       "version": "0.0.0",
       "dependencies": {
+        "lucide-react": "^1.47.0",
         "react": "^19.2.0",
         "react-dom": "^19.2.0"
       },
@@ -2257,6 +2258,15 @@
         "yallist": "^3.0.2"
       }
     },
+    "node_modules/lucide-react": {
+      "version": "1.47.0",
+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-1.47.0.tgz",
+      "integrity": "sha512-o8C23aXpNQypRY73W7fW02EyvWJinEMXgKeGjFoKym0zj3Q73hD97A1IQps1g8C14HTGsOpZL0Am+xjfgFZAbg==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/lz-string": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/lz-string/-/lz-string-1.5.0.tgz",
diff --git a/admin/package.json b/admin/package.json
index 9726bfe..cb86399 100644
--- a/admin/package.json
+++ b/admin/package.json
@@ -10,6 +10,7 @@
     "test": "vitest run"
   },
   "dependencies": {
+    "lucide-react": "^1.47.0",
     "react": "^19.2.0",
     "react-dom": "^19.2.0"
   },
@@ -24,4 +25,4 @@
     "vite": "^7.1.5",
     "vitest": "^3.2.4"
   }
-}
\ No newline at end of file
+}
diff --git a/admin/src/definitions/DefinitionsTab.css b/admin/src/definitions/DefinitionsTab.css
index 80c6fe7..a857716 100644
--- a/admin/src/definitions/DefinitionsTab.css
+++ b/admin/src/definitions/DefinitionsTab.css
@@ -414,6 +414,30 @@
   gap: 6px;
 }
 
+.defs-icon-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(var(--nq-a-tap-min), 1fr));
+  gap: 6px;
+}
+
+.defs-icon {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: var(--nq-a-tap-min);
+  border: 1px solid var(--nq-a-border);
+  border-radius: var(--nq-a-density-radius);
+  background: var(--nq-a-surface);
+  color: var(--nq-a-ink);
+  cursor: pointer;
+}
+
+.defs-icon--on {
+  border-color: transparent;
+  background: var(--nq-brand-gradient);
+  color: #fff;
+}
+
 .defs-due-times {
   display: flex;
   flex-direction: column;
diff --git a/admin/src/definitions/DefinitionsTab.test.tsx b/admin/src/definitions/DefinitionsTab.test.tsx
index 238f769..038429b 100644
--- a/admin/src/definitions/DefinitionsTab.test.tsx
+++ b/admin/src/definitions/DefinitionsTab.test.tsx
@@ -1,6 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { act, cleanup, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
 import DefinitionsTab from "./DefinitionsTab";
+import { DEFINITION_ICONS, DefinitionIcon } from "./definitionIcons";
 import type { AdminChild, DefinitionRule, QuestDefinition } from "../api/definitions";
 import { storeTokens } from "../auth/oidc";
 
@@ -134,7 +135,7 @@ function fakeApi(initial: QuestDefinition[]) {
         id: 99,
         title: body.title,
         description: null,
-        icon: null,
+        icon: body.icon ?? null,
         is_active: true,
         skip_on_away: body.skip_on_away,
         rule: body.rule,
@@ -158,6 +159,7 @@ function fakeApi(initial: QuestDefinition[]) {
           ? {
               ...d,
               title: body.title ?? d.title,
+              icon: "icon" in body ? body.icon : d.icon,
               skip_on_away: body.skip_on_away ?? d.skip_on_away,
               rule: body.rule ?? d.rule,
               // Like the API: a sent list replaces the whole set; an absent one keeps it.
@@ -331,6 +333,7 @@ describe("DefinitionsTab", () => {
         path: "/api/v1/admin/quest-definitions",
         body: {
           title: "Feed the cat",
+          icon: null,
           rule: {
             rule_type: "weekly",
             interval: 2,
@@ -419,6 +422,7 @@ describe("DefinitionsTab", () => {
         path: "/api/v1/admin/quest-definitions/11",
         body: {
           title: "Take out the bins",
+          icon: null,
           rule: {
             rule_type: "monthly_day",
             interval: 1,
@@ -436,9 +440,6 @@ describe("DefinitionsTab", () => {
         },
       },
     ]);
-    // The icon is never sent, so it is carried through unchanged.
-    expect(api.writes()[0].body).not.toHaveProperty("icon");
-
     await screen.findByText("Take out the bins");
     expect(api.listFetches()).toBe(2);
     expect(screen.queryByRole("dialog")).toBeNull();
@@ -918,3 +919,169 @@ describe("DefinitionsTab occurrence preview", () => {
     expect(api.previews()).toHaveLength(1);
   });
 });
+
+describe("DefinitionsTab icon picker", () => {
+  beforeEach(() => {
+    sessionStorage.clear();
+    storeTokens({ access_token: "at-123", expires_in: 600 });
+  });
+
+  afterEach(() => {
+    cleanup();
+    vi.unstubAllGlobals();
+    vi.useRealTimers();
+  });
+
+  /** The Lucide name a row renders, or null for the generic fallback glyph. */
+  function rowIcon(row: HTMLElement): string | null {
+    const svg = row.querySelector(".defs-row-glyph svg");
+    expect(svg).not.toBeNull();
+    return svg!.getAttribute("data-icon");
+  }
+
+  function iconRadio(s: HTMLElement, label: string): HTMLElement {
+    return within(within(s).getByRole("radiogroup", { name: "Icon" })).getByRole("radio", {
+      name: label,
+    });
+  }
+
+  it("ships the curated subset, and every entry renders an SVG", () => {
+    expect(DEFINITION_ICONS.map((entry) => entry.name)).toEqual([
+      "bed",
+      "bath",
+      "shower-head",
+      "toilet",
+      "brush",
+      "smile",
+      "shirt",
+      "washing-machine",
+      "utensils",
+      "cooking-pot",
+      "apple",
+      "brush-cleaning",
+      "spray-can",
+      "trash-2",
+      "recycle",
+      "sofa",
+      "house",
+      "backpack",
+      "book-open",
+      "pencil",
+      "music",
+      "dog",
+      "cat",
+      "fish",
+      "sprout",
+      "droplets",
+      "bike",
+      "volleyball",
+      "gamepad-2",
+      "star",
+      "heart",
+      "sun",
+      "moon",
+      "clock",
+      "calendar",
+      "list-checks",
+    ]);
+    expect(DEFINITION_ICONS.length).toBeGreaterThanOrEqual(24);
+    expect(DEFINITION_ICONS.length).toBeLessThanOrEqual(40);
+    for (const { name } of DEFINITION_ICONS) {
+      const { container, unmount } = render(<DefinitionIcon name={name} />);
+      const svg = container.querySelector("svg");
+      expect(svg, name).not.toBeNull();
+      expect(svg!.getAttribute("data-icon")).toBe(name);
+      expect(svg!.querySelectorAll("path, circle, rect, line, polyline, ellipse").length).toBeGreaterThan(0);
+      unmount();
+    }
+  });
+
+  it("a chosen icon is POSTed for a new task and renders on its row", async () => {
+    await renderReady();
+    fireEvent.click(screen.getByRole("button", { name: "New" }));
+    const s = sheet();
+    expect(iconRadio(s, "No icon").getAttribute("aria-checked")).toBe("true");
+
+    fireEvent.change(within(s).getByRole("textbox", { name: "Title" }), {
+      target: { value: "Make the bed" },
+    });
+    fireEvent.click(within(s).getByRole("button", { name: /Assigned children/ }));
+    fireEvent.click(within(s).getByRole("checkbox", { name: "Declan" }));
+    fireEvent.click(within(s).getByRole("button", { name: "Morning" }));
+    fireEvent.click(iconRadio(s, "Bed"));
+    expect(iconRadio(s, "Bed").getAttribute("aria-checked")).toBe("true");
+    expect(iconRadio(s, "Bed").className).toContain("defs-icon--on");
+    expect(iconRadio(s, "No icon").getAttribute("aria-checked")).toBe("false");
+
+    await act(async () => {
+      fireEvent.click(within(s).getByRole("button", { name: "Save changes" }));
+    });
+
+    expect(api.writes()).toHaveLength(1);
+    expect(api.writes()[0].method).toBe("POST");
+    expect((api.writes()[0].body as { icon: string }).icon).toBe("bed");
+    expect(rowIcon(await screen.findByTestId("definition-99"))).toBe("bed");
+  });
+
+  it("a chosen icon is PATCHed for an existing task without breaking the assignee omit", async () => {
+    await renderReady();
+    expect(rowIcon(screen.getByTestId("definition-11"))).toBeNull();
+    fireEvent.click(screen.getByTestId("definition-11"));
+    const s = sheet();
+    expect(iconRadio(s, "No icon").getAttribute("aria-checked")).toBe("true");
+    fireEvent.click(iconRadio(s, "Bins"));
+
+    await act(async () => {
+      fireEvent.click(within(s).getByRole("button", { name: "Save changes" }));
+    });
+
+    expect(screen.queryByTestId("unassign-confirm")).toBeNull();
+    expect(api.writes()).toHaveLength(1);
+    const { method, path, body } = api.writes()[0];
+    expect(method).toBe("PATCH");
+    expect(path).toBe("/api/v1/admin/quest-definitions/11");
+    expect((body as { icon: string }).icon).toBe("trash-2");
+    // Inactive "Old" stays assigned: the unchanged selection is still omitted.
+    expect(body).not.toHaveProperty("assignee_child_ids");
+    await waitFor(() => expect(rowIcon(screen.getByTestId("definition-11"))).toBe("trash-2"));
+  });
+
+  it("an unchanged icon is still sent on edit and shows as selected", async () => {
+    await renderReady();
+    expect(rowIcon(screen.getByTestId("definition-10"))).toBe("smile");
+    fireEvent.click(screen.getByTestId("definition-10"));
+    const s = sheet();
+    expect(iconRadio(s, "Smile").getAttribute("aria-checked")).toBe("true");
+    fireEvent.change(within(s).getByRole("textbox", { name: "Title" }), {
+      target: { value: "Brush teeth well" },
+    });
+
+    await act(async () => {
+      fireEvent.click(within(s).getByRole("button", { name: "Save changes" }));
+    });
+
+    expect((api.writes()[0].body as { icon: string }).icon).toBe("smile");
+  });
+
+  it("an unknown legacy icon falls back to the generic glyph and is kept on save", async () => {
+    const legacy: QuestDefinition = { ...BRUSH, id: 20, icon: "rocket-ship-9000" };
+    await renderReady([legacy]);
+    const row = screen.getByTestId("definition-20");
+    expect(rowIcon(row)).toBeNull();
+
+    fireEvent.click(row);
+    const s = sheet();
+    const group = within(s).getByRole("radiogroup", { name: "Icon" });
+    for (const radio of within(group).getAllByRole("radio")) {
+      expect(radio.getAttribute("aria-checked")).toBe("false");
+    }
+
+    await act(async () => {
+      fireEvent.click(within(s).getByRole("button", { name: "Save changes" }));
+    });
+
+    expect((api.writes()[0].body as { icon: string }).icon).toBe("rocket-ship-9000");
+    await waitFor(() => expect(screen.queryByRole("dialog")).toBeNull());
+    expect(rowIcon(screen.getByTestId("definition-20"))).toBeNull();
+  });
+});
diff --git a/admin/src/definitions/DefinitionsTab.tsx b/admin/src/definitions/DefinitionsTab.tsx
index 05cc19a..b4803b5 100644
--- a/admin/src/definitions/DefinitionsTab.tsx
+++ b/admin/src/definitions/DefinitionsTab.tsx
@@ -1,8 +1,6 @@
 /**
- * Definitions ("Tasks") tab — list + edit sheet (design/ADMIN-SPEC.md §3.1–3.2).
- *
- * The icon picker (§3.3) is a separate task: an existing definition's icon is
- * carried through unchanged by never sending it.
+ * Definitions ("Tasks") tab — list + edit sheet with icon picker
+ * (design/ADMIN-SPEC.md §3.1–3.3).
  */
 import {
   useEffect,
@@ -44,6 +42,7 @@ import {
   PlusGlyph,
   TaskGlyph,
 } from "./glyphs";
+import { DEFINITION_ICONS, DefinitionIcon } from "./definitionIcons";
 import "./DefinitionsTab.css";
 
 /** ADMIN-SPEC §1: every scroll column ends with 92px so content clears the tab bar. */
@@ -78,6 +77,8 @@ const WEEKDAY_LONG = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "S
 
 interface Draft {
   title: string;
+  /** A Lucide name; a legacy value outside the subset is kept until replaced. */
+  icon: string | null;
   assigneeIds: number[];
   repeats: Repeats;
   interval: string;
@@ -117,6 +118,7 @@ function newDraft(activeChildren: AdminChild[]): Draft {
   const today = new Date();
   return {
     title: "",
+    icon: null,
     assigneeIds: activeChildren.length === 1 ? [activeChildren[0].id] : [],
     repeats: "daily",
     interval: "1",
@@ -141,6 +143,7 @@ function draftFrom(definition: QuestDefinition, activeChildren: AdminChild[]): D
   for (const w of definition.windows) dueTimes[w.window] = w.due_time ?? "";
   return {
     title: definition.title,
+    icon: definition.icon,
     // Inactive children cannot be submitted (the API rejects them with 422).
     assigneeIds: definition.assignees.map((a) => a.id).filter((id) => active.has(id)),
     repeats: REPEATS_BY_RULE[rule.rule_type],
@@ -233,6 +236,7 @@ function buildBody(draft: Draft, keepsAssignees = false): DefinitionCreateBody |
   );
   return {
     title,
+    icon: draft.icon,
     rule,
     assignee_child_ids: [...draft.assigneeIds],
     windows,
@@ -319,7 +323,7 @@ function DefinitionRow({
         onClick={onOpen}
       >
         <span className="defs-row-glyph">
-          <TaskGlyph />
+          <DefinitionIcon name={definition.icon} />
         </span>
         <span className="defs-row-text">
           <span className="defs-row-title">{definition.title}</span>
@@ -558,6 +562,35 @@ function EditSheet({
             />
           </Field>
 
+          <Field label="Icon" id="defs-label-icon">
+            <div className="defs-icon-grid" role="radiogroup" aria-labelledby="defs-label-icon">
+              <button
+                type="button"
+                role="radio"
+                aria-checked={draft.icon === null}
+                aria-label="No icon"
+                className={draft.icon === null ? "defs-icon defs-icon--on" : "defs-icon"}
+                onClick={() => update({ icon: null })}
+              >
+                <TaskGlyph size={18} />
+              </button>
+              {DEFINITION_ICONS.map(({ name, label, Icon }) => (
+                <button
+                  key={name}
+                  type="button"
+                  role="radio"
+                  aria-checked={draft.icon === name}
+                  aria-label={label}
+                  data-icon-option={name}
+                  className={draft.icon === name ? "defs-icon defs-icon--on" : "defs-icon"}
+                  onClick={() => update({ icon: name })}
+                >
+                  <Icon size={18} aria-hidden="true" focusable="false" />
+                </button>
+              ))}
+            </div>
+          </Field>
+
           <Field label="Assigned children" id="defs-label-children">
             <button
               type="button"
diff --git a/admin/src/definitions/definitionIcons.tsx b/admin/src/definitions/definitionIcons.tsx
new file mode 100644
index 0000000..dbf0a3d
--- /dev/null
+++ b/admin/src/definitions/definitionIcons.tsx
@@ -0,0 +1,103 @@
+/**
+ * The shipped Lucide subset a definition's `icon` may name (ADMIN-SPEC §3.3).
+ * Only these named imports are bundled — no CDN, no runtime fetch. The stored
+ * value is the Lucide kebab-case name, so it stays meaningful to any surface.
+ */
+import {
+  Apple,
+  Backpack,
+  Bath,
+  Bed,
+  Bike,
+  BookOpen,
+  Brush,
+  BrushCleaning,
+  Calendar,
+  Cat,
+  Clock,
+  CookingPot,
+  Dog,
+  Droplets,
+  Fish,
+  Gamepad2,
+  Heart,
+  House,
+  ListChecks,
+  Moon,
+  Music,
+  Pencil,
+  Recycle,
+  Shirt,
+  ShowerHead,
+  Smile,
+  Sofa,
+  SprayCan,
+  Sprout,
+  Star,
+  Sun,
+  Toilet,
+  Trash2,
+  Utensils,
+  Volleyball,
+  WashingMachine,
+  type LucideIcon,
+} from "lucide-react";
+import { TaskGlyph } from "./glyphs";
+
+export interface DefinitionIconEntry {
+  name: string;
+  label: string;
+  Icon: LucideIcon;
+}
+
+export const DEFINITION_ICONS: readonly DefinitionIconEntry[] = [
+  { name: "bed", label: "Bed", Icon: Bed },
+  { name: "bath", label: "Bath", Icon: Bath },
+  { name: "shower-head", label: "Shower", Icon: ShowerHead },
+  { name: "toilet", label: "Toilet", Icon: Toilet },
+  { name: "brush", label: "Brush", Icon: Brush },
+  { name: "smile", label: "Smile", Icon: Smile },
+  { name: "shirt", label: "Clothes", Icon: Shirt },
+  { name: "washing-machine", label: "Laundry", Icon: WashingMachine },
+  { name: "utensils", label: "Meal", Icon: Utensils },
+  { name: "cooking-pot", label: "Cooking", Icon: CookingPot },
+  { name: "apple", label: "Snack", Icon: Apple },
+  { name: "brush-cleaning", label: "Sweep", Icon: BrushCleaning },
+  { name: "spray-can", label: "Clean", Icon: SprayCan },
+  { name: "trash-2", label: "Bins", Icon: Trash2 },
+  { name: "recycle", label: "Recycling", Icon: Recycle },
+  { name: "sofa", label: "Tidy", Icon: Sofa },
+  { name: "house", label: "Home", Icon: House },
+  { name: "backpack", label: "School bag", Icon: Backpack },
+  { name: "book-open", label: "Reading", Icon: BookOpen },
+  { name: "pencil", label: "Homework", Icon: Pencil },
+  { name: "music", label: "Music", Icon: Music },
+  { name: "dog", label: "Dog", Icon: Dog },
+  { name: "cat", label: "Cat", Icon: Cat },
+  { name: "fish", label: "Fish", Icon: Fish },
+  { name: "sprout", label: "Plants", Icon: Sprout },
+  { name: "droplets", label: "Water", Icon: Droplets },
+  { name: "bike", label: "Bike", Icon: Bike },
+  { name: "volleyball", label: "Sport", Icon: Volleyball },
+  { name: "gamepad-2", label: "Games", Icon: Gamepad2 },
+  { name: "star", label: "Star", Icon: Star },
+  { name: "heart", label: "Heart", Icon: Heart },
+  { name: "sun", label: "Morning", Icon: Sun },
+  { name: "moon", label: "Bedtime", Icon: Moon },
+  { name: "clock", label: "Clock", Icon: Clock },
+  { name: "calendar", label: "Calendar", Icon: Calendar },
+  { name: "list-checks", label: "Checklist", Icon: ListChecks },
+];
+
+const BY_NAME = new Map(DEFINITION_ICONS.map((entry) => [entry.name, entry]));
+
+export function findDefinitionIcon(name: string | null): DefinitionIconEntry | null {
+  return name === null ? null : (BY_NAME.get(name) ?? null);
+}
+
+/** A definition's glyph; no icon, or one outside the subset, gets the generic task glyph. */
+export function DefinitionIcon({ name, size = 17 }: { name: string | null; size?: number }) {
+  const entry = findDefinitionIcon(name);
+  if (!entry) return <TaskGlyph size={size} />;
+  return <entry.Icon size={size} aria-hidden="true" focusable="false" data-icon={entry.name} />;
+}