1. singular noun A thumbs-up or a thumbs-up sign is a sign that you make by raising your thumb to show that you agree with someone, that you are happy with an idea or situation, or that everything is all right. ⇒ She checked the hall, then gave the others a thumbs-up sign. 2. singular noun If you give a plan, idea, or suggestion the thumbs-up, you indicate that you approve of it and are willing to accept it. [informal] [+ to] ⇒ The financial markets have given the thumbs up to the new policy. ⇒ It more or less gets the thumbs up from everyone.
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