definition of
plane

[1] #1 plane n. [airplane, aeroplane] an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane". wn

[2] #2 plane n. [sheet] (mathematics) an unbounded two-dimensional shape; "we will refer to the plane of the graph as the X-Y plane"; "any line joining two points on a plane lies wholly on that plane". wn

[3] #3 plane n. a level of existence or development; "he lived on a worldly plane". wn

[4] #4 plane v. [shave] cut or remove with or as if with a plane; "The machine shaved off fine layers from the piece of wood". wn

[5] #5 plane s. [flat, level] having a surface without slope, tilt in which no part is higher or lower than another; "a flat desk"; "acres of level farmland"; "a plane surface"; "skirts sewn with fine flat seams". wn