Dictionary and Thesaurus

Definition of Certain

• (a.) Assured in mind; having no doubts; free from suspicions concerning.
• (a.) Determined; resolved; -- used with an infinitive.
• (a.) Not to be doubted or denied; established as a fact.
• (a.) Actually existing; sure to happen; inevitable.
• (a.) Unfailing; infallible.
• (a.) Fixed or stated; regular; determinate.
• (a.) Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.
• (n.) Certainty.
• (n.) A certain number or quantity.
• (adv.) Certainly.

Synonyms of Certain

• Sure
• Sure
• Sealed
• Sure
• Sure

Antonyms of Certain

• Uncertain
• Unsure
• Uncertain
• Uncertain
• Unsealed

Homophones of Certain