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Adjective: 4
  1. Being one more than three
    - four, iv
Noun: 4
  1. The cardinal number that is the sum of three and one
    - four, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe

Derived forms: 4s

See also: cardinal

Type of: digit, figure

Encyclopedia: 4,5-Dihydroxy-2,3-pentanedione