3D may refer to:Three dimensional Something having three
dimensions e.g. width, length, and depth
Three-dimensional space, the physical universe we live inA
vector space or
coordinate space with three dimensions
Volume, a measure of space
Stereoscopy, any technique capable of recording three-dimensional visual information or creating the illusion of depth in an image
Stereo camera, a camera with two or more lenses that simulates human binocular vision
3-D film, any visual presentation system that attempts to maintain or recreate moving images of the third dimension
3D computer graphics, computer graphics modeling three-dimensional objects
Anaglyph image, a 3D effect when viewed with 2 color glasses
Stereogram, an optical illusion of depth created from a flat, two-dimensional image
3D Computer Aided Design or "3D CAD"
Surround sound, sometimes called 3D sound
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3-D. A graphic display of depth, width, and height.