certain
Usage
What are other ways to say certain?
Certain, one of a handful of adjectives indicating full belief and trust that something is true, suggests that there are definite reasons that have freed one from doubt. Confident emphasizes the strength of the belief or the certainty of expectation felt. Positive implies emphatic certainty, which may even become overconfidence or dogmatism. Sure, the simplest and most general term, expresses mere absence of doubt.
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.
Instead, the researchers observed a local minimum in the oscillation amplitude across certain temperature ranges.
From Science Daily ● Sep. 5, 2026
Other supporters are less certain, but say they have lost faith with mainstream parties that have dominated politics for decades.
From BBC ● Sep. 4, 2026
Regulators will also determine whether Tesla acted based on assumptions that certain Federal Motor Vehicle Safety Standards don’t apply to the Cybercab.
From Los Angeles Times ● Sep. 4, 2026
Some of those notes might ask that they see certain evidence again, they might want to see certain transcripts, they might need the judge to instruct them on the law.
From Slate ● Sep. 4, 2026
While she was certain the Tome of Ushers said nothing about a heavily decorated pigeon arriving in Deadwood, the bird seemed to know something Gingersnipes did not.
From "The Undead Fox of Deadwood Forest" by Aubrey Hartman
Vocabulary lists containing certain
The Real Deal: Synonyms for "True"
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List 1
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A Sure Thing: Synonyms for "Definite"
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