3D

3D may refer to:

Three dimensional

* Something having three dimensions e.g. width, length, and depth
* Three-dimensional space, the physical universe
** A 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 TV
** 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"

Other

* 3D textured geometry with height, width and depth.
* "3D" (album), by TLC
* 3-D (band), a short-lived American rock band of the early 1980s
* 3D/Biela, a lost periodic comet discovered in 1826
* 3D (Long Island bus)
* 3-D Secure, a secure protocol for online credit and debit card transactions
* The 3D's, a rock band
* British threepence coin, written as 3d, from the pre-decimal (£sd) system
* Robert Del Naja, an English artist and musician in the band Massive Attack
*Dirty, Dangerous and Demeaning jobs