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

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

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

“What time is it?” “It's four.” I leave each day at four. Four (of them) are broken.

Definition of four in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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