There are 4 main definitions of plane in English:

## plane 1

Pronunciation: /plān/

## noun

1A flat surface on which a straight line joining any two points on it would wholly lie: the horizontal plane
More example sentences
• He then considered the problem of when the geodesics on a surface could be represented as straight lines on the plane.
• What is the path of an object dragged along a horizontal plane by a string of constant length when the end of the string not joined to the object moves along a straight line in the plane?
• The style was mathematical in its use of columns in straight lines, and flat planes.
Synonyms
flat surface, level surface;
1.1An imaginary flat surface through or joining material objects: the planets orbit the sun in roughly the same plane
More example sentences
• This is achieved by placing imaginary planes at the mouths of a channel that separates the pore region from the bulk water.
• The current is computed from the number of ions that pass through an imaginary plane near the end of the channel during a simulation period.
• The two orthogonal nodal planes separating these quadrants represent the fault plane and an imaginary plane called the auxiliary plane.
1.2A flat or level surface of a material object: the plane of his forehead
More example sentences
• When the strike-off operation is performed well, the surface plane of the concrete is flat with few ups and downs to be corrected with a bull float.
• Second, for the kinetic behavior, we have assumed that the diffusion in the plane of the surface is much faster than the motion perpendicular to it.
• To add a greater degree of difficulty, the students also had to break the plane of the surface on which they were working.
1.3A flat surface producing lift by the action of air or water over and under it.
2A level of existence, thought, or development: everything is connected on the spiritual plane
More example sentences
• It is as if she has already passed into a higher plane of existence and is recalling mortal limitations from the other side, as it were.
• Jack had a little posse made up of rich kids who thought being rich placed you on a higher plane of existence than the rest of the world.
• By then, the crowd had migrated into a higher plane of metal-rock-consciousness.
Synonyms
level, degree, standard, stratum;
position, rung, echelon

[attributive]
1Completely level or flat.
Example sentences
• Each speaker was on a plane level with the listener's head and approximately 10 inches from the wall.
• I accomplished this by placing against the objective a piece of glass which was plane on one side and curved on the other, so as to be a portion of a cylinder of large diameter.
Synonyms
smooth, regular, uniform
technical planar
1.1Relating to only two-dimensional surfaces or magnitudes: plane and solid geometry
More example sentences
• He therefore added a preface of his own on applications of logarithms to both plane trigonometry and to spherical trigonometry.
• Among the subjects to which his principal papers related were plane and solid geometry, theory of numbers, and link motion.
• He published a treatise on the analytic geometry of plane curves in 1756.

## verb

[no object]
1(Of a bird or an airborne object) soar without moving the wings; glide: a bird planed down toward the water below
More example sentences
• There comes a point, alas, when a baby bird, trying its wings, finds it has planed down off the roof, and can't get back up again.
• No life stirred except where, against the sky, buzzards planed and glided on motionless wings.
Synonyms
soar, glide, float, drift, wheel
1.1(Of a boat, surfboard, etc.) skim over the surface of water as a result of lift produced hydrodynamically.
Example sentences
• He stood in a slight crouch amidships, his knees bent just enough so that he could maintain balance as the boat planed along the waters, the hull bouncing and slapping down the waves passing underneath the bow.
• Once the vessel started planing with a lower freeboard aft the fender would be low enough to bounce on the sea surface.
• Even a slightly dirty bottom can keep your boat from planing or, on a displacement hull, can slow it down dramatically.
Synonyms
skim, glide

## Origin

Early 17th century: from Latin planum 'flat surface', neuter of the adjective planus 'plain'. The adjective was suggested by French plan(e) 'flat'. The word was introduced to differentiate the geometric senses, previously expressed by plain1, from the latter's other meanings.

## Words that rhyme with plane

abstain, appertain, arcane, arraign, ascertain, attain, Bahrain, bane, blain, brain, Braine, Cain, Caine, campaign, cane, cinquain, chain, champagne, champaign, Champlain, Charmaine, chicane, chow mein, cocaine, Coleraine, Coltrane, complain, constrain, contain, crane, Dane, deign, demesne, demi-mondaine, detain, disdain, domain, domaine, drain, Duane, Dwane, Elaine, entertain, entrain, explain, fain, fane, feign, gain, Germaine, germane, grain, humane, Hussein, inane, Jain, Jane, Jermaine, Kane, La Fontaine, lain, lane, legerdemain, Lorraine, main, Maine, maintain, mane, mise en scène, Montaigne, moraine, mundane, obtain, ordain, Paine, pane, pertain, plain, Port-of-Spain, profane, rain, Raine, refrain, reign, rein, retain, romaine, sane, Seine, Shane, Sinn Fein, skein, slain, Spain, Spillane, sprain, stain, strain, sustain, swain, terrain, thane, train, twain, Ujjain, Ukraine, underlain, urbane, vain, vane, vein, Verlaine, vicereine, wain, wane, Wayne

Syllabification: plane

## plane 2

Pronunciation: /plān/

## noun

An airplane.
Example sentences
• Air traffic control uses radar to track planes both on the ground and in the air, and also to guide planes in for smooth landings.
• Most small planes appreciate in value, and all parts need to be Transport Canada certified and approved.
• He learned his first local lesson in the fall of 1993 when he stepped off a plane in nearby Yakima in shorts, into raw weather.
Synonyms
aircraft, airplane, airliner, jet, jumbo jet, jetliner, twin-jet, bush plane, float plane, seaplane, crop duster, water bomber

## verb

[no object] rare
Travel in an airplane.
Example sentences
• An internal passenger flight had crashed on take-off from Washington: coughing a few feet off the ground before planing through a crowded commuter bridge and plunging into the frozen river beyond.
• I planed down by Gulf Air's cheap service (called Gulf Traveller) and it was absolutely atrocious.

## Origin

Early 20th century: shortened form.

Syllabification: plane

There are 4 main definitions of plane in English:

## plane 3

Pronunciation: /plān/

## noun

A tool consisting of a block with a projecting steel blade, used to smooth a wooden or other surface by paring shavings from it.
Example sentences
• My primary tool interest is as a collector, especially of wooden planes by different makers.
• Carpenters had mallets, hammers, drills, chisels, scrapers, planes, and copper saws at their disposal.
• An interesting handled smooth plane surfaced at a local flea market this past summer.

## verb

[with object]
1Smooth (wood or other material) with a plane.
Example sentences
• If the face frame projects beyond the side of the cabinet, plane the wood until it is flush.
• Or you may have to shave a hair off a miter or plane the back edge of a cut to make a tight joint.
• Any areas of the wood that show cupping or crowning will need to be planed by using a jointer or table saw as demonstrated in the videotape.
1.1Reduce or remove (redundant material) with a plane: high areas can be planed down
More example sentences
• The oak-based glulam was then planed down again to smaller sections.
• Before a term begins, new towels replace old ones and the outer layer of a chopping block is planed down.
• The blocks are cut along the length of the tree before being planed down, and the artist is thus obliged to cut through the texture of the wood with very sharp tools.
1.2 archaic Make smooth or level.

## Origin

Middle English: from a variant of obsolete French plaine 'planing tool', from late Latin plana (in the same sense), from Latin planare 'make level', from planus 'plain, level'.

Syllabification: plane

There are 4 main definitions of plane in English:

## plane 4

Pronunciation: /plān/
(also plane tree)

## noun

A tall spreading tree of the northern hemisphere, with maplelike leaves and bark that peels in irregular patches.
Example sentences
• The focal point of the park is the now defunct fountain, surrounded by conifers, oaks, planes, jacarandas, and tipiana trees dropping their yellow blossoms.
• Emei's flora is renowned; sub-tropical ferns and strands of bamboo huddle amidst plane and fir trees.
• No songbirds to tangle in the hedges, in shrubs, up above your head in the crowns of cypress and in the branches of chestnut trees, plane trees.

## Origin

Late Middle English: from Old French, from Latin platanus, from Greek platanos, from platus 'broad'.

Syllabification: plane

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