sev ‧ en ‧ ty /ˈsev ə nti/ BrE AmE number
[ Language: Old English ; Origin: seofontig , from seofon 'seven' ]
1 . the number 70
2 . the seventies [plural] ( also the '70s, the 1970s ) the years from 1970 to 1979:
We lost touch during the seventies.
the early/mid/late seventies
In the early seventies, Sag Harbor was still a peaceful village.
3 . be in your seventies to be aged between 70 and 79
early/mid/late seventies
Bill must be in his mid seventies now.
4 . in the seventies if the temperature is in the seventies, it is between 70 degrees and 79 degrees
in the low/mid/high seventies
sunny, with temperatures in the mid seventies
—seventieth adjective :
her seventieth birthday