(1) 兄弟，弟，兄(male child of the same parents)[C]：Do you have any～s? 你有兄弟(兄或弟)嗎? one's elder/younger～哥哥/弟弟;one's husband's～丈夫的兄弟;He's been like a～to me.他一直像我的親兄弟一樣。the Smith～s/the～s Smith史密斯兄弟;
(2) (男)同事(志，僚)(male fellow member of the same group， society， profession， etc)[C]：one's～doctors/officers/judges 醫(yī)務(wù)界同行/軍隊(duì)同僚/法院同事;～s in arms戰(zhàn)友;All men are our～s.天下男人都是我們的兄弟! We must fight for our rights，～s! 弟兄們，我們應(yīng)該爭取我們的權(quán)利! He is a fraternity～of mine.他是我的一個(gè)哥們兒?！纪絝ellowman，comrade，companion，colleague;
(3) 男教友;修士(male member of a religious organization)[C]：Christian B～(基督教)修士;B～Martin馬丁修士;The brethren met every week.男教友們每周會(huì)面。〖同〗monk;
→′brotherly adj 兄弟(般)的;′brotherliness n 手足之情;′brotherless adj 無兄弟的; ′brotherhood n 兄弟關(guān)系;同仁(志)之情;′brother-in-law n 夫或妻的兄弟;′stepbrother n 異父(母)兄弟;′halfbrother n 異父(母)兄弟;
【注意】the brothers Smith 和 the Smith brothers 都對(duì)，但前者是舊用法，現(xiàn)代越來越多用后者。sisters也是放在姓后，如：the Bronte sisters。