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

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

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.

Aristotle explained natural processes in terms of four causes: formal, final, material and efficient. Built four years earlier in 1915, the tank stood fifty feet high and ninety feet wide.

5 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, …

noun Something having four parts, units, or members, such as a musical quartet or a four-cylinder engine. idiom (all fours) All four limbs of an animal or person.

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 is a cardinal number that represents the quantity or value of a group or collection consisting of three additional units. It is the number that follows three and precedes five in the numerical sequence.