/ Dictionary / Index C centenary: Meaning and Definition of Find definitions for: cen•ten•ar•y Pronunciation: (sen-ten'u-rē, sen'tn-er"ē esp. Brit. sen-tē'nu-rē), [key] — adj., n., pl. -ar•ies. —adj. of or pertaining to a period of 100 years. recurring once in every 100 years: a centenary celebration. —n. a centennial. a period of 100 years; century. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: centenary (Thesaurus) centenarian centenionalis 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