背对背 bèiduìbèi back to back Definitions Defs Origin Strokes Stroke Words Sentences Sents bèiduìbèi back to back 背 bèi noun back the back of a person or animal对 對 duì preposition to face to face; to be opposite to背 bèi noun back the back of a person or animalbèiduìbèi behind one's back 背 bèi locativeadverb behind someone's back to do something in secret; to hide something from others对 對 duì preposition to face to face; to be opposite to背 bèi locativeadverb behind someone's back to do something in secret; to hide something from others