A surname.

plural of Certain

(euphemistic, chiefly of a person) Middle-aged or older.

Synonym of make sure.

simple past tense and past participle of make certain

present participle of make certain

Third-person singular simple present indicative form of make certain

plural of certain event

(probability theory) An event that contains all of the possible outcomes and thus is known a priori to be certain to occur; the entire sample space.