1. To give a preliminary swing to the arm pitching, as in baseball.
2. When you say that someone or something winds up a certain way or winds up doing something, you mean that this situation was the result of a series of decisions, actions, or unplanned and unexpected occurrences. End up is similar to wind up.

1. When you turn the handle or key of a mechanical toy, watch, or clock to make it operate, you wind it up.
2. When you wind up an activity or event, you finish it or get ready to finish it. Wrap up is similar to wind up.
3. When you wrap something long, such as an electrical cord, rope, string, or measuring tape, around and around so that it is in a ball or on a spool, you wind it up.