First recorded in 1400–50 (for def. 9) (in the sense “to soar”); 1640–50 for noun and adjective senses; (noun) from Latin plānum “flat surface” (noun use of plānus “flat”); (adjective) from Latin plānus; first used to distinguish the geometrical senses formerly belonging to plain1; (in def. 5), shortened form of airplane, aeroplane, or hydroplane; (verb) late Middle English planen “(of a bird) to soar” (compare Middle French planer ); akin to plain1
Carpentry. any of various woodworking instruments for paring, truing, or smoothing, or for forming moldings, chamfers, rabbets, grooves, etc., by means of an inclined, adjustable blade moved along and against the piece being worked.
a trowellike tool for smoothing the surface of clay in a brick mold.
verb (used with object),planed,plan·ing.
to smooth or dress with or as if with a plane or a planer.
to remove by or as if by means of a plane (usually followed by away or off).
verb (used without object),planed,plan·ing.
to work with a plane.
to function as a plane.
Origin of plane
First recorded in 1375–1425; Middle English noun plane, plaine, pleine, from Middle French plan(n)e, Old French plaine, plane or directly from Late Latin plāna “plane, adz,” derivative of plānāre “to smooth,” itself derivative of Latin plānusplain1; Middle English verb plane(n), plaine, pleine, from Middle French planer or directly from Late Latin plānāre
First recorded in 1350–1400; Middle English plane, plaine, from Middle French plane, Old French pleine, plane, from Latin platanus, from Greek plátanos, derivative of platýs “wide, broad, flat” (with reference to the leaves)