Certain

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

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.