Definition of sign off in US English:

sign off

phrasal verb

  • 1Conclude a letter, broadcast, or other message.

    ‘he signed off with a few words of advice’
    • ‘At the end of every message that you post, you can sign off by mentioning your name and the URL of your web site.’
    • ‘I did a broadcast in which I said, I'm signing off now because there's a censor standing there and I'm not supposed to say something and I'd rather say nothing.’
    • ‘‘Our customers end up saving more and getting a lot more than yours do,’ said the letter before signing off as ‘Your friends at Wanadoo’.’
    • ‘The letter signs off with ‘I have no doubt we can look forward to your continued cooperation and support’.’
    • ‘She ended her message by saying: ‘Now I need to sign off or I will be cycling home in the dark with no lights!’’
    • ‘When posting a message, remember to sign off with your name, followed by CPA, Esq. or both, public practice or industry and your city.’
    • ‘It has been my honor to serve you this year, but before I sign off, I have one more message to share with you.’
    • ‘It was their farewell message as they signed off.’
    • ‘They were signing off for the season at the end of the broadcast last night.’
    • ‘I will sign off now with a honest, true and heartfelt message from Britain.’
    1. 1.1 Sign to record that one is leaving work for the day.
    2. 1.2Bridge Indicate by a conventional bid that one is seeking to end the bidding.