Definition

Without elevations or depressions; even; level; flat; lying in, or constituting, a plane; as, a plane surface.

Other Definitions

This word also has 2 other definitions:

PLANE (noun)

Any tree of the genus Platanus.

PLANE (verb)

1. To make smooth; to level; to pare off the inequalities of the surface of, as of a board or other piece of wood, by the use of a plane; as, to plane...