|a.||1.||Assured in mind; having no doubts; free from suspicions concerning.|
|2.||Determined; resolved; - used with an infinitive.|
|3.||Not to be doubted or denied; established as a fact.|
|4.||Actually existing; sure to happen; inevitable.|
|6.||Fixed or stated; regular; determinate.|
|7.||Not specifically named; indeterminate; indefinite; one or some; - sometimes used independenty as a noun, and meaning certain persons.|
|2.||A certain number or quantity.|
|Adj.||1.||certain - definite but not specified or identified; "set aside a certain sum each week"; "to a certain degree"; "certain breeds do not make good pets"; "certain members have not paid their dues"; "a certain popular teacher"; "a certain Mrs. Jones"|
|2.||certain - having or feeling no doubt or uncertainty; confident and assured; "felt certain of success"; "was sure (or certain) she had seen it"; "was very sure in his beliefs"; "sure of her friends"|
|3.||certain - established beyond doubt or question; definitely known; "what is certain is that every effect must have a cause"; "it is certain that they were on the bus"; "his fate is certain"; "the date for the invasion is certain"|
uncertain - not established beyond doubt; still undecided or unknown; "an uncertain future"; "a manuscript of uncertain origin"; "plans are still uncertain"; "changes of great if uncertain consquences"; "without further evidence his story must remain uncertain"
|4.||certain - certain to occur; destined or inevitable; "he was certain to fail"; "his fate is certain"; "In this life nothing is certain but death and taxes"- Benjamin Franklin; "he faced certain death"; "sudden but sure regret"; "he is sure to win"|
uncertain - not certain to occur; not inevitable; "everything is uncertain about the army"; "the issue is uncertain"
|5.||certain - established irrevocably; "his fate is sealed"|
|6.||certain - capable of being depended on; "a quick and certain remedy"; "a sure way to distinguish the two"; "wood dust is a sure sign of termites"|
|7.||certain - exercising or taking care great enough to bring assurance; "be certain to disconnect the iron when you are through"; "be sure to lock the doors"|