1. The decade from 1950 to 1959
   "Rock and roll music became popular in the fifties";
   - 1950s
    
2. The time of life between 50 and 60
   "In his mid-fifties, he decided to retire and travel the world";
   - mid-fifties

1. The cardinal number that is the product of ten and five
   "The restaurant can seat fifty people";
   - 50, L
    
2. A United States bill worth 50 dollars
   "She withdrew two fifty dollar bills from the ATM";
   - fifty dollar bill

Type of: bank bill, bank note, banker's bill [N. Amer], banknote, bill [N. Amer], decade, decennary [archaic], decennium, Federal Reserve note [US], government note [US], greenback [US, informal], large integer, note, time of life

Part of: adulthood, maturity

Encyclopedia: Fifties