/ˈbrʌðə(r) ||; ˈbrʌðɚ/noun[C] 1 a man or boy who has the same parents as another person 兄；弟: Michael and Jim are brothers. 迈克尔和吉姆是亲兄弟。Michael is Jim's brother. 迈克尔是吉姆的哥哥。a younger/older brother 弟弟；哥哥 ☞Look at half-brother and stepbrother. 参看 half-brother 及 stepbrother。
There is no common English word that means ‘both brothers and sisters’ Have you got any brothers and sisters? The word sibling is very formal. 英语中没有一个意思包含兄弟姐妹的常用词：Have you got any brothers and sisters? 你有兄弟姐妹吗？sibling 为非常正式的用语。 2 a man who is a member of a Christian religious community （基督教团体的）男成员，弟兄
3 (informal 非正式) a man who you feel close to because he is a member of the same society, group, etc as you 挚友，伙伴（因同属一个社团、团体等而感情密切的人）