diff --git a/src/actions/PlayAnimation.js b/src/actions/PlayAnimation.js
index 86e45f8e4..a359a4355 100644
--- a/src/actions/PlayAnimation.js
+++ b/src/actions/PlayAnimation.js
@@ -5,7 +5,7 @@
  */
 
 /**
- * [description]
+ * Play an animation with the given key, starting at the given startFrame on all Game Objects in items.
  *
  * @function Phaser.Actions.PlayAnimation
  * @since 3.0.0
@@ -13,8 +13,8 @@
  * @generic {Phaser.GameObjects.GameObject[]} G - [items,$return]
  *
  * @param {(array|Phaser.GameObjects.GameObject[])} items - An array of Game Objects. The contents of this array are updated by this Action.
- * @param {string} key - [description]
- * @param {(string|integer)} [startFrame] - [description]
+ * @param {string} key - The name of the animation to play.
+ * @param {(string|integer)} [startFrame] - The starting frame of the animation with the given key.
  *
  * @return {(array|Phaser.GameObjects.GameObject[])} The array of Game Objects that was passed to this Action.
  */
diff --git a/src/geom/line/Line.js b/src/geom/line/Line.js
index 1b65e23c1..39692ea53 100644
--- a/src/geom/line/Line.js
+++ b/src/geom/line/Line.js
@@ -19,10 +19,10 @@ var Vector2 = require('../../math/Vector2');
  * @constructor
  * @since 3.0.0
  *
- * @param {number} [x1=0] - [description]
- * @param {number} [y1=0] - [description]
- * @param {number} [x2=0] - [description]
- * @param {number} [y2=0] - [description]
+ * @param {number} [x1=0] - The x coordinate of the lines starting point.
+ * @param {number} [y1=0] - The y coordinate of the lines starting point.
+ * @param {number} [x2=0] - The x coordinate of the lines ending point.
+ * @param {number} [y2=0] - The y coordinate of the lines ending point.
  */
 var Line = new Class({
 
@@ -36,7 +36,7 @@ var Line = new Class({
         if (y2 === undefined) { y2 = 0; }
 
         /**
-         * [description]
+         * The x coordinate of the lines starting point.
          *
          * @name Phaser.Geom.Line#x1
          * @type {number}
@@ -45,7 +45,7 @@ var Line = new Class({
         this.x1 = x1;
 
         /**
-         * [description]
+         * The y coordinate of the lines starting point.
          *
          * @name Phaser.Geom.Line#y1
          * @type {number}
@@ -54,7 +54,7 @@ var Line = new Class({
         this.y1 = y1;
 
         /**
-         * [description]
+         * The x coordinate of the lines ending point.
          *
          * @name Phaser.Geom.Line#x2
          * @type {number}
@@ -63,7 +63,7 @@ var Line = new Class({
         this.x2 = x2;
 
         /**
-         * [description]
+         * The y coordinate of the lines ending point.
          *
          * @name Phaser.Geom.Line#y2
          * @type {number}
@@ -83,7 +83,7 @@ var Line = new Class({
      * @param {float} position - [description]
      * @param {(Phaser.Geom.Point|object)} [output] - [description]
      *
-     * @return {(Phaser.Geom.Point|object)} A Point, or point-like object, containing the coordinates of the point around the ellipse.
+     * @return {(Phaser.Geom.Point|object)} A Point, or point-like object, containing the coordinates of the point on the line.
      */
     getPoint: function (position, output)
     {
@@ -110,16 +110,16 @@ var Line = new Class({
     },
 
     /**
-     * [description]
+     * Get a random Point on the Line.
      *
      * @method Phaser.Geom.Line#getRandomPoint
      * @since 3.0.0
      *
      * @generic {Phaser.Geom.Point} O - [point,$return]
      *
-     * @param {(Phaser.Geom.Point|object)} [point] - [description]
+     * @param {(Phaser.Geom.Point|object)} [point] - An instance of a Point to be modified.
      *
-     * @return {Phaser.Geom.Point} [description]
+     * @return {Phaser.Geom.Point} A random Point on the Line.
      */
     getRandomPoint: function (point)
     {
@@ -127,15 +127,15 @@ var Line = new Class({
     },
 
     /**
-     * [description]
+     * Set new coordinates for the line endpoints.
      *
      * @method Phaser.Geom.Line#setTo
      * @since 3.0.0
      *
-     * @param {number} [x1=0] - [description]
-     * @param {number} [y1=0] - [description]
-     * @param {number} [x2=0] - [description]
-     * @param {number} [y2=0] - [description]
+     * @param {number} [x1=0] - The x coordinate of the lines starting point.
+     * @param {number} [y1=0] - The y coordinate of the lines starting point.
+     * @param {number} [x2=0] - The x coordinate of the lines ending point.
+     * @param {number} [y2=0] - The y coordinate of the lines ending point.
      *
      * @return {Phaser.Geom.Line} This Line object.
      */
diff --git a/src/geom/line/Random.js b/src/geom/line/Random.js
index 7a82ac745..8fc8af9d2 100644
--- a/src/geom/line/Random.js
+++ b/src/geom/line/Random.js
@@ -7,17 +7,17 @@
 var Point = require('../point/Point');
 
 /**
- * [description]
+ * Returns a random point on a given Line.
  *
  * @function Phaser.Geom.Line.Random
  * @since 3.0.0
  *
  * @generic {Phaser.Geom.Point} O - [out,$return]
  *
- * @param {Phaser.Geom.Line} line - [description]
- * @param {(Phaser.Geom.Point|object)} [out] - [description]
+ * @param {Phaser.Geom.Line} line - The Line to calculate the random Point on.
+ * @param {(Phaser.Geom.Point|object)} [out] - An instance of a Point to be modified.
  *
- * @return {(Phaser.Geom.Point|object)} [description]
+ * @return {(Phaser.Geom.Point|object)} A random Point on the Line.
  */
 var Random = function (line, out)
 {
diff --git a/src/geom/point/Point.js b/src/geom/point/Point.js
index 0393c3efe..79fc20c33 100644
--- a/src/geom/point/Point.js
+++ b/src/geom/point/Point.js
@@ -8,7 +8,7 @@ var Class = require('../../utils/Class');
 
 /**
  * @classdesc
- * [description]
+ * Defines a Point in 2D space, with an x and y component.
  *
  * @class Point
  * @memberOf Phaser.Geom
@@ -49,7 +49,7 @@ var Point = new Class({
     },
 
     /**
-     * [description]
+     * Set the x and y coordinates of the point to the given values.
      *
      * @method Phaser.Geom.Point#setTo
      * @since 3.0.0