English definition of “behind”
BACK › at or to the back of someone or something: Close the door behind you. The pub is behind the train station. The letter had fallen behind the desk.
LESS SUCCESSFUL › slower or less successful than someone or something: Our team is 3 points behind the winners. The building work is already behind schedule (= late).
CAUSING › causing something, or responsible for something: What was the reason behind her decision to leave?
SUPPORTING › giving your help or support to someone: The group is 100 percent behind her.
NOT AFFECTING › If a bad experience or your own bad behaviour is behind you, it does not exist or affect your life now: He's put his criminal past behind him.