3D is defined as a system or effect used in a movie or object to provide three dimensions - width, length and depth.
(noun)An example of 3D is a movie in which you are given special glasses to watch.
See 3-D in Webster's New World College Dictionary
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adjective
noun
See 3-D in American Heritage Dictionary 4
or 3D also three-D
adjectiveLearn more about 3-D
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