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.
The benefits were seen not only in patients with diabetes but also in those with non-diabetic CKD and certain forms of glomerular disease.
From Science Daily • Jun. 8, 2026
These antioxidants, found in certain foods, can support heart health, circulation and blood vessel elasticity by reducing inflammation, it says.
From BBC • Jun. 8, 2026
Since the fall, the administration has curbed plans to impose penalties on certain Chinese companies, levy hefty tariffs and investigate China-linked hackers.
From The Wall Street Journal • Jun. 8, 2026
The move to lower prices on certain items seems like a savvy extension of its policy.
From Barron's • Jun. 8, 2026
Believers hissed, certain that the former celebrity medium was being paid to betray the spirits.
From "American Spirits" by Barb Rosenstock
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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