forties (root: forty)

Noun forties has 2 senses

• forties(n = noun.time) mid-forties - the time of life between 40 and 50; Array
is a kind of time of life
is a part of adulthood, maturity

• forties(n = noun.time) 1940s - the decade from 1940 to 1949; Array
is a kind of decade, decennary, decennium