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.