1.at the back of someone or something; following someone or something; on the other side of something from where you are
2.used for saying what causes something or who is responsible for making it happen, especially when this is not obvious
3.late or too slow in doing things that you have to do
4.remaining in a place after people have left
5.used for saying that someone or something is less successful or has made less progress than others; used for saying that one person or team has a lower score or is less likely to win than their opponent
6.used for saying that someone supports a person, action, or idea
7.used for saying that someone’s appearance or behavior hides their real character or feelings; used for talking about the real facts of a situation that people do not know
8.if a bad experience or unpleasant situation is behind you, it no longer affects you or makes you unhappy; if you have useful experience behind you, it gives you an advantage because you have gained skills and knowledge from it