To end something.
To announce the closing of a pub for the day.
To call a timeout.
To indicate that an activity, especially the taking of a test, is complete.
The expected time of arrival for participants in a performance event, e.g., a play or concert.
To interrupt the continuance of; to put an end to, especially as regards commercial productions; to stop producing, making, or supplying.
To consciously cease the ingestion or administration of (a pharmaceutical drug).