If you curse, you use rude or offensive language, usually because you are angry about something.

If you curse someone, you say insulting things to them because you are angry with them.

If you curse something, you complain angrily about it, especially using rude language.

If you say that there is a curse on someone, you mean that there seems to be a supernatural power causing unpleasant things to happen to them.

You can refer to something that causes a great deal of trouble or harm as a curse .