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Synonyms

for certain

Idioms  

  1. 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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The pact defends workers against increases in healthcare costs and protects employees from paying for certain protective equipment that they wear to do their jobs, the union said.

From The Wall Street Journal • Apr. 13, 2026

The bill would have limited the lists agencies could use to monitor for certain cars, required enhanced data security and privacy training for officers and mandated that certain data be deleted after 60 days.

From Los Angeles Times • Apr. 7, 2026

"There's also a need for certain non-disposable drone missions, capable of operating in challenging environments... that will be able to return or carry out missions further afield," he added.

From Barron's • Apr. 3, 2026

Though they are not crimes, NCHIs stay on police records and can be disclosed during enhanced background checks when applying for certain jobs.

From BBC • Mar. 30, 2026

I thought, for certain, that my heart had stopped.

From "A Very Large Expanse of Sea" by Tahereh Mafi

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.