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.

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

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

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

“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.

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 …

Feb 23, 2026 · 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 …