'Four' definitions:

Definition of 'four'

From: WordNet
adjective
Being one more than three [syn: four, 4, iv]
noun
The cardinal number that is the sum of three and one [syn: four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe]
noun
A playing card or domino or die whose upward face shows four pips [syn: four-spot, four]

Definition of 'Four'

From: GCIDE
  • Four \Four\ (f[=o]r), a. [OE. four, fower, feower, AS. fe['o]wer; akin to OS. fiwar, D. & G. vier, OHG. fior, Icel. fj[=o]rir, Sw. fyra, Dan. fire, Goth. fidw[=o]r, Russ. chetuire, chetvero, W. pedwar, L. quatuor, Gr. te`ttares, te`ssares, pi`syres, Skr. catur. [root]302. Cf. Farthing, Firkin, Forty, Cater four, Quater-cousin, Quatuor, Quire of paper, tetrarch.] One more than three; twice two. [1913 Webster]

Definition of 'Four'

From: GCIDE
  • Four \Four\, n.
  • 1. The sum of four units; four units or objects. [1913 Webster]
  • 2. A symbol representing four units, as 4 or iv. [1913 Webster]
  • 3. Four things of the same kind, esp. four horses; as, a chariot and four. [1913 Webster]
  • All fours. See All fours, in the Vocabulary. Fourb