fifties Meaning, Definition & Usage

1. noun the decade from 1950 to 1959
   1950s.
   
2. noun the time of life between 50 and 60
   mid-fifties.
   
3. noun the cardinal number that is the product of ten and five
   L; 50; fifty.
   
4. noun a United States bill worth 50 dollars
   fifty dollar bill; fifty.
   

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