| ̷ ̷ ̷ ̷| ̷ ̷( ̷ ̷) ̷ ̷ adjective
1. : of or involving three dimensions
three-dimensional space
2. : giving the illusion of depth or varying distances — used of a pictorial representation (as a photograph or a motion picture in which this illusion is enhanced by stereoscopic or other means); compare two-dimensional
3. : describing or being described in well-rounded completeness
a three-dimensional analysis of multiple historical processes — L.L.Snyder
especially : lifelike
the only book of the batch … that has three-dimensional characters — David Dempsey
4. : of, relating to, or involving military operations in three spheres (as land, sea, and air)