centenary UK /sɛnˈtiːnəɹi/US /sɛnˈtɛnəɹi/adjective 4verb 1noun 8forms 3 adjective4 •Of or related to the number one hundred. •Occurring every 100 years. •Lasting or aged 100 years, 100-year-old. •(no longer used, historical) Of or relating to hundreds, the administrative unit. verb1 •(no longer used) To celebrate the centennial of. noun8 •Synonym of centennial: a hundredth anniversary.In the midst of a world war many centenaries pass unnoticed, but one which fell on August 2, namely, the opening of Fenchurch Street station, is deserving of record. — 1941 •Synonym of hundredweight, especially (historical) in Greek and Roman contexts. •(historical) Synonym of centgrave: a position in the Frankish Empire overseeing local administration. •(historical) Synonym of hundredman: a position in the Anglo-Saxon kingdoms overseeing local administration. •(no longer used) Synonym of century: a period of 100 years. •(no longer used, rare) Synonym of centenarian: a person 100 or more years old. •(no longer used) Synonym of centurion: An officer commanding 100 men, especially (historical) in the Roman army. •(no longer used) Synonym of hundred: a collection of 100 things. formscentenaried · centenarying · centenaries