sign off on

sign off on (something)

To give express, formal approval of something, often by literally signing a document. We're just waiting for the boss to sign off on the project before we start working. My thesis supervisor has to sign off on each chapter I write to make sure I'm staying focused on the topic.
See also: off, on, sign
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

sign off on something

to sign a paper, indicating that one has finished with something or agrees with the state of something. The publisher signed off on the book and sent it to be printed. I refuse to sign off on this project until it is done correctly.
See also: off, on, sign
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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