2d meaning

(2Dimensional) Objects that are rendered visually on paper, film or on screen in two planes representing width and height (X and Y). Two-dimensional structures are also used in the construction of 3D objects. See 3D and CAD.

Two-dimensional; 2D.

Second, as in: after the first; commonly used in legal writing.

(UK, dated) Two pence, tuppence (in pre-decimalisation currency, never used for 'two new pence').

Abbreviation of two-dimensional.