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.

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

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.

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 …

6 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, …

In mathematics, the number four is an even number and the smallest composite number. Four is also the second square number after one. A small minority of people have four fingers on each hand and …

four definition: the number after three and before five. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "four twenty", "ten four", "in the …

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

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