in no uncertain terms

in no uncertain terms

Very explicitly and emphatically. He told me in no uncertain terms that if it happens again, I'll be expelled. There is no doubt. The contract states, in no uncertain terms, what must happen in cases like this.
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in no uncertain terms

Cliché in very specific and direct language. I was so mad. I told her in no uncertain terms to leave and never come back. I told him in no uncertain terms to stop calling me.
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in no uncertain terms

Emphatically, definitely so. For example, Jane told them in no uncertain terms that she wanted no part of their practical joke. The double negative in this idiom serves for emphasis. [Mid-1900s] Also see in so many words.
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in no uncertain terms

If someone tells a person something in no uncertain terms, they say it strongly and clearly so that there is no doubt about what they mean. She told him in no uncertain terms to go away.
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in no uncertain terms

clearly and forcefully.
1991 Kaye Gibbons A Cure for Dreams My mother got the doctor back out to our house and told him in no uncertain terms to do what he was paid to do.
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in ˌno unˌcertain ˈterms

clearly and forcefully: I told him in no uncertain terms what I thought of his behaviour.
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References in classic literature ?
His ideas of music-hall costumes had never gone beyond short skirts, a swirl of lace, and glittering sequins; but Miss Antonia had expressed herself on that subject in no uncertain terms.
As expected Arteta squared up to take it when Yakubu, who had failed to make an impression in the first half, snatched the ball away and told Mikel in no uncertain terms that he was taking this one.
Control Data's lead attorney in the lawsuit, commented: "The court ruled in no uncertain terms that the AlphaCyber product is basically a rip-off of Control Data's software.
Consumers told us, in no uncertain terms, they want a product that is simple to use, offers complete control over their listening experience, and has a wide variety of music.