sixties
n. C / U A2 Elementary US //ˈsɪkstiz// UK //sˈɪkstɪz// six·ties
n. the years from 1960 to 1969, or the age between 60 and 69.
n. the decade of the twentieth century spanning from 1960 to 1969; also refers to the years of a person's life between sixty and seventy.
My parents were born in the sixties.
The sixties saw a massive shift in popular music and fashion across the Western world.
While many associate the sixties with radical social change, the early years of the decade remained culturally conservative in most rural areas.
Usage
Usually plural and preceded by the definite article 'the'. When referring to the decade, it is often written as '60s'.
Pitfall
He is in his sixtyHe is in his sixtiesWhen referring to a person's age range or a decade, the plural form must be used.