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

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

3 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 …

/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, …

1. The cardinal number equal to 3 + 1. 2. The fourth in a set or sequence. 3. Something having four parts, units, or members, such as a musical quartet or a four-cylinder engine.

Four is the second square number (a "square number" is an integer that can be written as the square of some other integer) and the second centered triangular number.