Webster’s Revised Unabridged Dictionary · 1913
Certain
Cer′tain (sẽr′tĭn), a. [F. certain, fr. (assumed) LL. certanus, fr. L. certus determined, fixed, certain, orig. p. p. of cernere to perceive, decide, determine; akin to Gr. κρίνειν to decide, separate, and to E. concern, critic, crime, riddle a sieve, rinse, v.] 1. Assured in mind; having no doubts; free from suspicions concerning.
To make her certain of the sad event. Dryden.
I myself am certain of you. Wyclif.
2. Determined; resolved; — used with an infinitive.
However, I with thee have fixed my lot, Certain to undergo like doom. Milton.
3. Not to be doubted or denied; established as a fact.
The dream is certain, and the interpretation thereof sure. Dan. ii. 45.
4. Actually existing; sure to happen; inevitable.
Virtue that directs our ways Through certain dangers to uncertain praise. Dryden.
Death, as the Psalmist saith, is certain to all. Shak.
5. Unfailing; infallible.
I have often wished that I knew as certain a remedy for any other distemper. Mead.
6. Fixed or stated; regular; determinate.
The people go out and gather a certain rate every day. Ex. xvi. 4.
7. Not specifically named; indeterminate; indefinite; one or some; — sometimes used independenty as a noun, and meaning certain persons.
It came to pass when he was in a certain city. Luke. v. 12.
About everything he wrote there was a certain natural grace und decorum. Macaulay.
For certain, assuredly. — Of a certain, certainly.
Syn. — Bound; sure; true; undeniable; unquestionable; undoubted; plain; indubitable; indisputable; incontrovertible; unhesitating; undoubting; fixed; stated.
Cer′tain, n. 1. Certainty. [Obs.] Gower.
2. A certain number or quantity. [Obs.] Chaucer.
Cer′tain, adv. Certainly. [Obs.] Milton.