n. 1. the decade from 1950 to 1959. [ WordNet 1.5 ]
2. the time of life between 50 and 60. Syn. -- mid-fifties. [ WordNet 1.5 ]
n. One of fifty equal parts; the quotient of a unit divided by fifty. [ 1913 Webster ]
a. [ AS. fīftigoða. See Fifty. ] 1. Next in order after the forty-ninth; -- the ordinal of fifty. [ 1913 Webster ]
2. Consisting of one of fifty equal parts or divisions. [ 1913 Webster ]