noun. the decade from 1950 to 1959.

noun. the time of life between 50 and 60.

noun. Plural form of fifty.

noun. Fifty-dollar bills.

noun. The decade of the 1850s, 1950s, etc.

noun. The decade of one's life from age 50 through age 59.

noun. the time of life between 50 and 60

noun. the decade from 1950 to 1959

"A lot of the cumulative brain trauma leaves players demented in their fifties is actually sustained during practice."

quinquagenarian  

decade  decennary  decennium  time of life  

mid-fifties