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.

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

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

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

Four definition: The cardinal number equal to 3 + 1.

Jul 8, 2025 · Unpack the meaning of "four" in our comprehensive glossary entry. Discover its etymology from Proto-Indo-European, explore definitions, common phrases, and real-world examples across …