# plane1

Line breaks: plane
Pronunciation: /pleɪn /

### 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;
the flat, horizontal
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, stage, degree, standard, stratum;
position, rung, echelon, footing

1Completely level or flat: a plane surface
More 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
flat, level, horizontal, even, flush, levelled, true;
smooth, regular, uniform
technical planar
rare homaloidal
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

1(Of a bird or an airborne object) soar without moving the wings; glide: seagulls swooped and planed overhead
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 [no object] (Of a boat, surfboard, etc.) skim over the surface of water as a result of lift produced by hydrodynamic means.
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

### 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 geometrical senses, previously expressed by plain1, from the latter's other meanings.

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# plane2

Line breaks: plane
Pronunciation: /pleɪn /

### noun

An aeroplane: [as modifier]: a plane crash
More example sentences
• The plane crashed on the helicopter landing pad adjacent to the Pentagon.
• Fighters, transport planes, bombers and helicopters will fill the skies over RAF Fairford in the run-up to the air show this weekend.
• The same flight control radar systems are used in helicopters, low-flying private planes, light aircraft and stealth bombers.
Synonyms
British aeroplane;
North American airplane, ship
informal bird
British informal , dated kite

### verb

Travel in an aeroplane: I had planed into the large air terminal at Los Angeles
More 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.

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### Translate plane

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# plane3

Line breaks: plane
Pronunciation: /pleɪn /

### 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

1Smooth (wood or other material) with a plane: plane the edges of the wood to a smooth finish
More 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.
1.1 [with object and adverbial] Reduce or remove (unwanted material) with a plane: plane off any swollen wood before repainting
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.

### Origin

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

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### Translate plane

into Arabic into French into German into Italian into Spanish

# plane4

Line breaks: plane
Pronunciation: /pleɪn /
(also plane tree)

### noun

A tall spreading tree of the northern hemisphere, with maple-like leaves and bark which peels in uneven 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'.

## Definition of plane in:

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