What is Four?
Four definition and meaning on Dictionary terms:
a cardinal number, three plus one.
a symbol of this number, 4 or IV or IIII.
a set of this many persons or things.
a playing card, die face, or half of a domino face with four pips.
fours, Jazz. alternate four-bar passages, as played in sequence by different soloists: with guitar and piano trading fours.
Automotive. an automobile powered by a four-cylinder engine. the engine itself.
amounting to four in number.