- plane
- {{11}}plane (n.1) "flat surface," c.1600, from L. plantum "flat surface," properly neuter of adjective planus "flat, level, plain, clear," from PIE *pla-no- (Cf. Lith. plonas "thin;" Celtic *lanon "plain;" perhaps also Gk. pelanos "sacrificial cake, a mixture offered to the gods, offering (of meal, honey, and oil) poured or spread"), suffixed form of root *pele- "to spread out, broad, flat" (Cf. O.C.S. polje "flat land, field," Rus. polyi "open;" O.E., O.H.G. feld, M.Du. veld "field"). Figurative sense is attested from 1850.{{12}}plane (n.3) "tool for smoothing surfaces," mid-14c., from O.Fr. plane, earlier plaine (14c.), from L.L. plana, from planare "make level," from L. planus "level, flat" (see PLANE (Cf. plane) (n.1)).{{13}}plane (n.4) "tree of the genus Platanus," late 14c., from O.Fr. plane, earlier plasne (14c.), from L. platanus, from Gk. platanos, earlier platanistos "plane tree," a species from Asia Minor, associated with platys "broad," in reference to its leaves (see PLACE (Cf. place) (n.)). Applied since 1778 in Scotland and northern England to the sycamore, whose leaves somewhat resemble those of the true plane tree.{{14}}plane (v.1) "to make smooth," early 14c., from O.Fr. planer (12c.), from L.L. planare "make level," from L. planus "level, flat" (see PLANE (Cf. plane) (n.1)). Related: Planed; planing.{{15}}plane (v.2) "soar, glide on motionless wings," 1610s, from M.Fr. planer (16c.), from L. planum "flat surface" (see PLANE (Cf. plane) (n.1)), on notion of bird gliding with flattened wings. Of boats, etc., "to skim over the surface of water," it is first found 1913. Related: Planed; planing.
Etymology dictionary. 2014.