sign off v. i. To terminate a communication, especially one conducted by radio waves; to terminate a broadcast over radio or television; as, this is your reporter in Cairo, signing off.
... the ketch Willi-Waw, Bombi Bight, Island of Anna, Solomon Islands," he read. "Know all men by these presents that I do hereby sign off and release in full, for due value received, all debts whatsoever owing to me by Harrison J. Griffiths, who has this day paid to ... — A Son Of The Sun • Jack London
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