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.
However, the role of nutrition is particularly intriguing, as certain dietary supplements may help support cellular health later in life.
From Science Daily • Jun. 11, 2026
And intensifying competition means we will increasingly be in “an investing landscape where certain segments of the economy and markets are starved for capital, while others are flush with attractive financing options.”
From Barron's • Jun. 10, 2026
When questioned about other visa issues, which have affected fans and team delegates too, Infantino deflected attention to the 2035 Women's World Cup - which is almost certain to be awarded to the United Kingdom.
From BBC • Jun. 10, 2026
It seems likely, if not certain, that the whole cooties thing would have been DOA in high school.
From The Wall Street Journal • Jun. 10, 2026
But just a few minutes ago I was certain that he had been the one to torment me.
From "The Brightwood Code" by Monica Hesse
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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