|Origin:||nigontig, from nigon 'nine'|
the number 90
2TMC [plural] also the '90s, the 1990s
the years from 1990 to 1999:
America was far richer in the nineties.
the early/mid/late nineties
The industry received a lot of bad publicity in the early nineties.
to be aged between 90 and 99
My grandfather was in his early nineties when he died.
if the temperature is in the nineties, it is between 90 degrees and 99 degrees
in the low/mid/high nineties
Temperatures were still in the high nineties.
her ninetieth birthday