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A class, also referred to as an object type, is like a blueprint. An object doesn't exist until you create it, or instantiate it, from a class definition. An object is an instance of a class.
Properties are the characteristics of an object. For example, when you align movie clips, you change the _x and _y properties of the MovieClip object. A property is a variable that is attached to a class. A property can either be public, which means it is accessible outside the class, or private, which means it can be accessed only within the class.
In object-oriented terms, a method is a behavior or procedure that can act on the object. A hypothetical throw() method on a ball would know the size and weight of the ball. A method is aware of the object and all the properties that it contains and can work on that object.
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