/ Dictionary / Index C centenarian: Meaning and Definition of Find definitions for: cen•te•nar•i•an Pronunciation: (sen"tn-âr'ē-un), [key] — adj. pertaining to or having lived 100 years. —n. a person who has reached the age of 100. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: centenarian (Thesaurus) centavo centenary Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language