dimension (Noun) — The magnitude of something in a particular direction (especially length, width or height).
dimension (Noun) — A construct whereby objects or individuals can be distinguished.
dimension (Noun) — One of three Cartesian coordinates that determine a position in space.
dimension (Noun) — Magnitude or extent. ex. "a building of vast dimensions"
dimension (Noun) — (physics) the physical units of a quantity, expressed in terms of fundamental quantities like time, mass and length. ex. "velocity has dimensions of length/time"
dimension (Noun) — (science fiction) an alternative universe or plane of existence.
dimension (Verb) — Indicate the dimensions on. ex. "These techniques permit us to dimension the human heart"
dimension (Verb) — Shape or form to required dimensions.