|Origin:||seofontig, from seofon 'seven'|
the number 70
2 [plural] also the '70s, the 1970sTMC
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.
to be aged between 70 and 79
Bill must be in his mid seventies now.
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
her seventieth birthday