brother noun
ADJ. big, elder, older Bill idolizes his big brother, who is a professional footballer. | baby, kid, little, small, wee, younger | twin | full (= sharing both parents) | half-(= sharing one parent), step-(also stepbrother) (= the son from an earlier marriage of your stepfather or stepmother) | beloved, much-loved She wrote daily to her beloved brother, Leo. | long-lost His old teacher greeted him like a long-lost brother. | dead, deceased, late He married the wife of his late brother. | bachelor, unmarried
PHRASES blood brothers (= close friends who have sworn to remain friends for life), brother and sister Have you got any brothers and sisters? | like brothers The boys are so close, they're like brothers.
You can also check other dicts: brother (English, 中文解释 ), wordnet sense, Collins Definition