Sign off and Wrap up

Sign off verb - Cease broadcasting; get off the air; as of radio stations.

Wrap up and sign off are semantically related. In some cases you can use "Wrap up" instead a verb "Sign off".

Wrap up verb - To bring (an event) to a natural or appropriate stopping point.

Sign off and wrap up are semantically related. Sometimes you can use "Sign off" instead a verb "Wrap up".