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1. Lit. [for a broadcaster] to announce the end of programming for the day; [for an amateur radio operator] to announce the end of a transmission. Wally signed off and turned the transmitter off. Channel 43 failed to sign off at the scheduled time last night.
2. Fig. to quit doing what one has been doing and leave, go to bed, quit trying to do something, etc. I have to sign off and get to bed. See you all. When you finally sign off tonight, please turn out all the lights.
to end a television or radio broadcast Both news programs came on the air at 4:36 p.m. and both signed off at 4:59 p.m. What will the network air on Tuesdays now that one of its most popular programs is signing off?
sign off (on something)
to officially agree to or support something Mary has to sign off on any expenses over $2,500. A judge must sign off on a search of anyone's property. If all parties sign off, the settlement would end eight years of court battles.
Usage notes: often used when someone agrees to something by putting their signature on an official document
1. Announce the end of a communication, especially a broadcast. For example, There's no one there now; the station has signed off for the night. [c. 1920]
2. Stop talking, become silent, as in Every time the subject of marriage came up, Harold signed off. [Colloquial; mid-1900s]
3. Express approval formally or conclusively, as in The President got the majority leader to sign off on the tax proposal. This usage is colloquial.
1. To announce the end of a communication; conclude: I've come to the end of my message, so now I'm signing off.
2. To stop transmission after identifying the broadcasting station: This is your morning radio host, signing off.
3. sign off on To express approval formally or conclusively: The president got Congress to sign off on the new tax proposal.