brother-in-law['brʌðərinlɔ:]n.1.■大伯子;大舅;小叔子;小舅2.■姐夫;妹夫3.■丈夫的姐夫;丈夫的妹夫;连襟姻兄,姻弟4.■内兄;内弟变形n.brothers-in-law