/'naɪntɪ; `naɪntɪ/
pron, det 90; one more than eighty-nine 90, 九十（个）. =>App
4 见附录4.

n
1 the number
90 *90; 九十.
2 the nineties [pl] numbers, years or temperature from
90 to
99 从90到99的数目、年数或温度.
3 (idm 习语) in one's nineties between the ages of
90 and
100 在90岁到100岁之间. ninety-nine times out of a hundred almost always 几乎总是; 十之八九. For the uses of ninety and ninetieth see the examples at five and fifth. 关于ninety和ninetieth的用法见five和fifth词条中的示例.

number
[Language: Old English;Origin: nigontig, from nigon 'nine']
the number 90
the nineties [plural]alsothe '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.
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.
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.
>ninetiethadj
　her ninetieth birthday