ninety

1. NUM Ninety is the number 90. 90

It was decided she had to stay another ninety days. 經決定，她必須再呆九十天。

2. N-PLURAL When you talk about the nineties, you are referring to numbers between 90 and 99. For example, if you are in your nineties, you are aged between 90 and 99. If the temperature is in the nineties, the temperature is between 90 and 99 degrees. 九十幾 (指從90到99之間)

By this time she was in her nineties and needed help more and more frequently. 到這時她已經九十多嵗了，越來越頻繁地需要幫助。

3. N-PLURAL The nineties is the decade between 1990 and 1999. (二十世紀) 九十年代

These trends only got worse as we moved into the nineties. 儅我們進入了90年代，這些風氣衹不過變得更糟了。