1 [pleyn]
a flat or level surface.
Geometry. a surface generated by a straight line moving at a constant velocity with respect to a fixed point.
Fine Arts. an area of a two-dimensional surface having determinate extension and spatial direction or position: oblique plane; horizontal plane.
a level of dignity, character, existence, development, or the like: a high moral plane.
an airplane or a hydroplane: to take a plane to Dallas.
a thin, flat or curved, extended section of an airplane or a hydroplane, affording a supporting surface.
Architecture. a longitudinal section through the axis of a column.
flat or level, as a surface.
of or pertaining to planes or plane figures.
verb (used without object), planed, planing.
to glide or soar.
(of a boat) to rise partly out of the water when moving at high speed.
Informal. to fly or travel in an airplane: We'll drive to Detroit and plane to Los Angeles.

1400–50 for sense “to soar”; 1640–50 for noun and adj. senses; (noun) < Latin plānum flat surface (noun use of plānus flat); (adj.) < Latin plānus; first used to distinguish the geometrical senses formerly belonging to plain1; in def. 5, shortened form of airplane, aeroplane, or hydroplane; (v.) late Middle English planen (of a bird) to soar (compare Middle French planer); akin to plain1

planeness, noun

4. stratum, stage. 7. smooth, even, flush. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
plane1 (pleɪn)
1.  maths a flat surface in which a straight line joining any two of its points lies entirely on that surface
2.  a flat or level surface
3.  a level of existence, performance, attainment, etc
4.  a.  short for aeroplane
 b.  a wing or supporting surface of an aircraft or hydroplane
5.  level or flat
6.  maths (of a curve, figure, etc) lying entirely in one plane
7.  to fly without moving wings or using engines; glide
8.  (of a boat) to rise partly and skim over the water when moving at a certain speed
9.  to travel by aeroplane
[C17: from Latin plānum level surface]

plane2 (pleɪn)
1.  a tool with an adjustable sharpened steel blade set obliquely in a wooden or iron body, for levelling or smoothing timber surfaces, cutting mouldings or grooves, etc
2.  a flat tool, usually metal, for smoothing the surface of clay or plaster in a mould
3.  to level, smooth, or cut (timber, wooden articles, etc) using a plane or similar tool
4.  (often foll by off) to remove using a plane
[C14: via Old French from Late Latin plāna plane, from plānāre to level]

plane3 (pleɪn)
See plane tree

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"flat surface," 1604, from L. plantum "flat surface," properly neut. of adj. 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 base *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"). Fig. sense is attested from 1850. The verb meaning "soar, glide on motionless wings" is first recorded 1611, from M.Fr. planer (16c.), from L. planum on notion of bird gliding with flattened wings. Of boats, etc., "to skim over the surface of water" it is first found 1913.

1908, short for aeroplane (see airplane).

"tool for smoothing surfaces," 1349, from O.Fr. plane, earlier plaine (14c.), from L.L. plana, from planare "make level," from L. planus "level, flat" (see plane (1)). The verb meaning "to make smooth" is c.1320, from O.Fr. planer (12c.), from L.L. planare.

"tree of the genus Platanus," 1382, 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 (n.)). Applied since 1778 in
Scotland and northern England to the sycamore, whose leaves somewhat resemble those of the true plane tree.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

plane 1 (plān)

  1. A surface containing all the straight lines that connect any two points on it.

  2. A flat or level surface.

  3. An imaginary surface formed by extension through any axis of the body or through two definite points on the body.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
plane   (plān)  Pronunciation Key 
Noun   A two-dimensional surface, any two of whose points can be joined by a straight line that lies entirely in the surface.

Adjective   Lying in a plane: a plane curve.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

plane definition

A geometrical location having only two dimensions — length and width (no height). (See coordinates and plane geometry.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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