forties
noun [ plural ] uk/ˈfɔː.tiz/ us/ˈfɔːr.t̬iz/
B2 四十多岁（指40到49岁的时期）
A person's forties are the period in which they are aged between 40 and 49.
She's probably in her early forties. 她大概40岁刚出头。
the forties （温度）四十多度
the range of temperature between 40° and 49°
The temperature is expected to be in the forties tomorrow. 预计明天气温有四十几度。
B2 四十年代
the decade (= period of ten years) between 40 and 49 in any century, usually 1940–1949
Our house was built some time in the forties. 我们的房子建于40年代的某个时期。