having long hair, fur, or wool, typically used to describe animals like dogs or sheep

这只长毛狗需要每天梳理毛发。

proper name · (derogatory) the Longhairs (Taiping rebels of the 19th century)

民间旧称太平军为“长毛”。

to grow hair or fur on the body

伤口愈合之后又开始长毛了。

verb · to become mildewed or develop mold

由于天气太潮湿，家里的馒头都长毛了。