~ 1
■ noun
1》 a flat surface on which a straight line joining any two points would wholly lie.
↘an imaginary flat surface through or joining material objects.
↘a flat surface producing lift by the action of air or water over and under it.
2》 a level of existence or thought: the spiritual ~.
■ adjective
1》 completely level or flat.
2》 relating to only two-dimensional surfaces or magnitudes: ~ and solid geometry.
■ verb
1》 (of a bird or an airborne object) soar without moving the wings; glide.
2》 (of a boat, surfboard, etc.) skim over the surface of water as a result of lift produced hydrodynamically.
Origin
C17: from L. planum 'flat surface', neut. of planus 'plain' (adjective).
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~ 2
■ noun short for aero~ .
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~ 3
■ noun a tool consisting of a block with a projecting steel blade, used to smooth a wooden surface by paring shavings from it.
■ verb smooth with a ~.
Origin
ME: from a var. of obs. Fr. plaine 'planing instrument', from late L. plana , from L. planare 'make level'.
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~ 4
(also ~ tree )
■ noun a tall spreading tree of the northern hemisphere, with maple-like leaves and bark which peels in uneven patches. [Genus Platanus .]
Origin
ME: from OFr., from L. platanus , from Gk platanos , from platus 'broad'.