Certain (a.) Assured in mind; having no doubts; free from suspicions concerning.

Certain (a.) Determined; resolved; -- used with an infinitive.

Certain (a.) Not to be doubted or denied; established as a fact.

Certain (a.) Actually existing; sure to happen; inevitable.

Certain (a.) Unfailing; infallible.

Certain (a.) Fixed or stated; regular; determinate.

Certain (a.) Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.

Certain (n.) Certainty.

Certain (n.) A certain number or quantity.

Certain (adv.) Certainly.