4

from WordNet (r) 3.0 (2006)

4
    adj 1: being one more than three [syn: {four}, {4}, {iv}]
    n 1: 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}]

from The Collaborative International Dictionary of English v.0.48

4 \4\ adj.
   1. one more than three; denoting a quantity consisting of
      four items or units; -- representing the number four as an
      Arabic numeral.

   Syn: four, iv
        [WordNet 1.5 +PJC]

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