eighties
noun [ plural ] uk/ˈeɪ.tiz/ us/ˈeɪ.t̬iz/
B2 八十多岁
A person's eighties are the period in which they are aged between 80 and 89.
My grandmother is in her eighties. 我祖母80多岁了。
the eighties （华氏）八十多度
the range of temperature between 80° and 89°
The temperature is expected to be in the eighties tomorrow. 明天温度预计为80多华氏度。