fifties (root: fifty)

Noun fifties has 2 senses

• fifties(n = noun.time) 1950s - the decade from 1950 to 1959;
is a kind of decade, decennary, decennium

• fifties(n = noun.time) mid-fifties - the time of life between 50 and 60;
is a kind of time of life
is a part of adulthood, maturity