Definition of “promise sb the earth/moon” - English Dictionary

british dictionary

“promise sb the earth/moon” in British English

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promise sb the earth/moon

informal

to say that you will do much greater things than you will ever be able to achieve:

Like most governments in their first term of office, they promised the earth.

(Definition of “promise sb the earth/moon” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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