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Origin of sign-off
How to use sign-off in a sentence
After more than 1,000 essays, Rooney gave his final signoff Sunday night on 60 Minutes.
Had it been anywhere close to implementation, he surely would have obtained White House signoff.
Formal signoff occurred by National Security Adviser Condoleezza Rice, involving her lawyer, John Bellinger.
British Dictionary definitions for sign-off
Idioms and Phrases with sign-off
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]
Stop talking, become silent, as in Every time the subject of marriage came up, Harold signed off. [Colloquial; mid-1900s]
Express approval formally or conclusively, as in The President got the majority leader to sign off on the tax proposal. This usage is colloquial.