sure, certain, positive, cocksure mean having no doubt or uncertainty. sure usually stresses the subjective or intuitive feeling of assurance. certain may apply to a basing of a conclusion or.
CERTAIN definition: free from doubt or reservation; confident; sure. See examples of certain used in a sentence.
CERTAIN definition: 1. having no doubt or knowing exactly that something is true, or known to be true, correct, exact.. Learn more.
- (postpositive) positive and confident about the truth of something; convinced: I am certain that he wrote a book. 2. (usually postpositive) definitely known: it is certain that they were on the bus. 3..
Jan 20, 2026 · certain (comparative more certain or certainer, superlative most certain or certainest) Sure in one's mind, positive; absolutely confident in the truth of something.
[before a noun] (used before a person or thing that is known in the mind of the speaker or writer, but that is being introduced to the listener): A certain Mr. Smith has been trying to meet you.
Sure: with an infinitive: as, he is certain to be there to-morrow. Synonyms Undeniable, unquestionable, undoubted, indubitable, indisputable, incontrovertible, inevitable.
If you say that something is certain, you firmly believe that it is true, or have definite knowledge about it. One thing is certain, both have the utmost respect for each other.
certain meaning, definition, what is certain: confident and sure, without any doubts: Learn more.
CERTAIN meaning: 1 : not having any doubt about something convinced or sure; 2 : used with it to say that something is known to be true or correct
