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

Google’s guarantees reduce the risk to lenders by making the technology giant responsible for certain payments if Anthropic can’t meet its obligations.

From The Wall Street Journal ● Jul. 30, 2026

“Though we cannot say for certain, it does look like they may have left the area on their great journey,” the nonprofit said, wishing them “a safe and successful life.”

From Los Angeles Times ● Jul. 29, 2026

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

From Barron's ● Jul. 16, 2026

"She tried to see the best in him, and maybe ignored certain things for certain reasons," said Jazz.

From BBC ● Jul. 10, 2026

A mixed-race woman born in 1735, Betty was the daughter of an enslaved African woman whose name is not known for certain and a white ship’s captain named Hemings.

From "In the Shadow of Liberty" by Kenneth C. Davis

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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