A four-sided plane figure is a quadrilateral or quadrangle, sometimes also called a tetragon. It can be further classified as a rectangle or oblong, kite, rhombus, and square.

The meaning of FOUR is a number that is one more than three. How to use four in a sentence.

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FOUR definition: a cardinal number, three plus one. See examples of four used in a sentence.

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Idiom on all fours (Definition of four from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

something representing, represented by, or consisting of four units, such as a playing card with four symbols on it

/fɔ/ IPA guide Other forms: fours Definitions of four noun the cardinal number that is the sum of three and one synonyms: 4, IV, Little Joe, foursome, quadruplet, quartet, quatern, quaternary, quaternion, …

2 days ago · Describing a set or group with four elements. four (countable and uncountable, plural fours) (countable) The digit or figure 4; an occurrence thereof. (countable) Anything measuring four units, …