Definition of “have it on the highest authority” - English Dictionary

british dictionary

“have it on the highest authority” in British English

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have it on the highest authority

formal

to have been told something by someone who knows the truth:

I have it on the highest authority that they are getting a divorce.

(Definition of “have it on the highest authority” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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