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- Dictionaryplane/pleɪn/
noun
- 1. a flat surface on which a straight line joining any two points on it would wholly lie: "the horizontal plane" Similar
- 2. a level of existence, thought, or development: "everything is connected on the spiritual plane" Similar
adjective
- 1. completely level or flat: "a plane surface"
verb
- 1. (of a bird or an airborne object) soar without moving the wings; glide: "seagulls swooped and planed overhead" Similar
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A plane is a flat, two-dimensional surface that prolongs infinitely far. Learn how to define a plane in geometry and algebra, and how to represent and classify it using points, lines and planes.
Learn what a plane is in math, how to identify and name planes, and the difference between parallel and intersecting planes. See examples, practice questions, and related articles on plane geometry.
PLANE definition: 1. a vehicle designed for air travel, with wings and one or more engines: 2. in mathematics, a…. Learn more.
Learn the various meanings and uses of the word plane, from a flat surface to an airplane. See synonyms, examples, etymology, and related words for plane.
In geometry, a plane is a flat surface of two dimensions. It extends endlessly and has no thickness. You can think of a piece of paper or the surface of a wall as a part of a geometric plane. The flat shapes in plane geometry are known as plane figures. We can measure them by their length and height or length and width.
Learn the meanings and uses of the word plane in different contexts, such as mathematics, carpentry, aeronautics, and plants. Compare and contrast the various senses and synonyms of plane with related terms.
A plane is a vehicle that flies through the air, but it is also a tool used to make something smooth and flat, a kind of tree or a level surface. As a verb, to plane something is to make it flat and smooth.