nine‧ty /ˈnaɪnti/
number[
Language: Old English;
Origin: nigontig, from nigon 'nine']
1. the number 90
2. the nineties [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.3. be in your nineties to be aged between 90 and 99
early/mid/late nineties My grandfather was in his early nineties when he died.4. in the nineties 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.—ninetieth adjective:
her ninetieth birthday [TahlilGaran] Dictionary of Contemporary English ▲