diff --git a/chrome/chrome.d.ts b/chrome/chrome.d.ts
index 3a01db6c1c..1aa91a2de5 100644
--- a/chrome/chrome.d.ts
+++ b/chrome/chrome.d.ts
@@ -2,6 +2,8 @@
 // Project: http://developer.chrome.com/extensions/
 // Definitions by: Matthew Kimber <https://github.com/matthewkimber>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
+// Chrome App: http://developer.chrome.com/apps/api_index.html
+// Definitions: Adam Lay
 
 ////////////////////
 // Alarms
@@ -34,6 +36,97 @@ declare module chrome.alarms {
     var onAlarm: AlarmEvent;
 }
 
+////////////////////
+// App Runtime
+////////////////////
+declare module chrome.app.runtime {
+    interface LaunchData {
+        id?: string;
+        items?: LaunchDataItem[];
+        url?: string;
+        referrerUrl?: string;
+        isKioskSession?: boolean;
+    }
+
+    interface LaunchDataItem {
+        entry: File;
+        type: string;
+    }
+
+    interface LaunchedEvent {
+        addListener(callback: (launchData: LaunchData) => void);
+    }
+
+    interface RestartedEvent {
+        addListener(callback: () => void);
+    }
+
+    var onLaunched: LaunchedEvent;
+    var onRestarted: RestartedEvent;
+}
+
+////////////////////
+// App Window
+////////////////////
+declare module chrome.app.window {
+    interface Bounds {
+        left?: number;
+        top?: number;
+        width?: number;
+        height?: number;
+    }
+
+    interface AppWindow {
+        focus: () => void;
+        fullscreen: () => void;
+        isFullscreen: () => boolean;
+        minimize: () => void;
+        isMinimized: () => boolean;
+        maximize: () => void;
+        isMaximized: () => boolean;
+        restore: () => void;
+        moveTo: (left: number, top: number) => void;
+        resizeTo: (width: number, height: number) => void;
+        drawAttention: () => void;
+        clearAttention: () => void;
+        close: () => void;
+        show: () => void;
+        hide: () => void;
+        getBounds: () => Bounds;
+        setBounds: (bounds: Bounds) => void;
+        contentWindow: Window;
+    }
+
+    interface CreateOptions {
+        id?: string;
+        minWidth?: number;
+        minHeight?: number;
+        maxWidth?: number;
+        maxHeight?: number;
+        frame?: string; // "none", "chrome"
+        bounds?: Bounds;
+        transparentBackground?: boolean;
+        state?: string; // "normal", "fullscreen", "maximized", "minimized" 
+        hidden?: boolean;
+        resizable?: boolean;
+        singleton?: boolean;
+    }
+
+    export function create(url: string, options?: CreateOptions, callback?: (created_window: AppWindow) => void): void;
+    export function current(): AppWindow;
+
+    interface WindowEvent {
+        addListener(callback: () => void): void;
+    }
+
+    var onBoundsChanged: WindowEvent;
+    var onClosed: WindowEvent;
+    var onFullscreened: WindowEvent;
+    var onMaximized: WindowEvent;
+    var onMinimized: WindowEvent;
+    var onRestored: WindowEvent;
+}
+
 ////////////////////
 // Bookmarks
 ////////////////////