- Announce the end of a broadcast or communication. 2. Stop talking; become silent. 3. Express formal approval.
Examples:
- The station has signed off for the night.
- There's no one there now; the station has signed off for the night.
Origin: c. 1920 (sense 1); mid-1900s (sense 2)
Synonyms: sign out, close down (sense 1), approve (sense 3)