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.
As science continues to study how and why our bodies age, one thing remains certain: We all need better support for our aging populations.
From The Wall Street Journal • Jun. 5, 2026
But with some countries remaining candidates for more than 15 years, support for joining the bloc has taken a hit in certain Balkan nations.
From Barron's • Jun. 5, 2026
Usually, eligibility is reserved for customers with at least $100,000 in certain assets at Fidelity.
From MarketWatch • Jun. 5, 2026
"In certain directions inside the crystal, the nodal lines intersect and cross the Fermi energy where electrons can move freely," explains Sánchez-Barriga.
From Science Daily • Jun. 5, 2026
I just felt it, certain that when his eyes went down, they were a bit crinkled, or that his lips tipped up just a tiny bit.
From "Legendary Frybread Drive-In" by Cynthia Leitich Smith
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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