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

But the gains are uneven, and significant challenges remain for certain types of events.

From Barron's ● Jul. 16, 2026

The revolution might yet be real, but we won’t know for certain for several more years.

From The Wall Street Journal ● Jul. 12, 2026

"If you can trick gold into dissociating oxygen, it can actually become a very effective catalyst for certain reactions," Montemore said.

From Science Daily ● Jul. 12, 2026

The hyperscalers must wait to see for certain if they can generate returns on their investments while for now, the depreciation expenses are rising.

From MarketWatch ● Jul. 10, 2026

Clues that tighten inside Axel’s gut, and this time, he knows for certain Daniel wouldn’t find it funny.

From "A Bird Will Soar" by Alison Green Myers

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

for certain

Example Sentences

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