Synonyms

for certain

Idioms

Also, for sure. Without doubt. For example, I can't tell for certain if this is the right color, or I know for sure that she has a new car. The first term dates from the early 1300s. The variant, dating from the late 1500s, is also used colloquially to express agreement or assert the truth of a statement, as in Mary is really bossy.—That's for sure, or Are you coming to the party?—For sure I am.

Example Sentences

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for certain

At the end of the hearing, she sentenced them each to 30 years in prison for certain crimes.

From BBC ● Oct. 27, 2026

For the first time, the company also introduced a voluntary retirement program for certain workers.

From Los Angeles Times ● Oct. 26, 2026

Anthony Bassili, the president of the asset-management division of crypto giant Coinbase, made a presentation to pitch a new private-credit fund for certain investors.

From The Wall Street Journal ● Oct. 22, 2026

Even then, there is the strong possibility that England will not know their fate for certain until two days later, when Tonga face 2022 finalists Samoa in their last group game.

From BBC ● Oct. 20, 2026

One thing is for certain, we were never going to find either food or water back down on that road.

From "An Elephant in the Garden" by Michael Morpurgo

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

for certain

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