Origin of fourMiddle English from Old English feower, akin to German vier, Gothic fidw?r from Indo-European base an unverified form kwetwor- from source Classical Latin quattuor, Welsh pedwar
- the cardinal number between three and five; 4; IV
- any group of four people or things
- something numbered four or having four units, as a playing card, face of a die, etc.
on all fours
- on all four feet
- on hands and knees (or feet)
- exactly equatable (with)