adult 成人的 Joe is married with two grown-up children. 乔已婚,有两个已成年的孩子。 ■suitable for or characteristic of an adult 适合于成年人的;成熟的 it seems a grown-up thing to do. 这好像是适合成年人干的事情。
noun
an adult (especially a child's word) (尤为儿童用语)成年人,大人 I don't like it when grown-ups get all serious. 我不喜欢大人那副严肃起来的样子。