To wind completely.

“I wound up the spool of rope.”

To end up; to arrive or result.

“I followed the signs, and I wound up getting nowhere.”

To conclude, complete, or finish.

“Even though he had bad news, he tried to wind up his speech on a positive note.”

The end or conclusion of something.

“Everyone is invited to our end-of-term wind-up party.”

A punch line of a joke or comedy routine.

A humorous attempt to fool somebody, a practical joke in which the victim is encouraged to believe something untrue.