Definition of "centenary"

centenary

/sɛnˈtɛnəri/

adjective
not comparable
1. Of or related to the number one hundred, particularly
  1. Occurring every 100 years.
  2. Lasting or aged 100 years, 100-year-old.
  3. (historical, obsolete) Of or relating to hundreds, the administrative unit.
noun
plural centenaries
1. (obsolete) Synonym of centurion: An officer commanding 100 men, especially (historical) in the Roman army.
2. (obsolete) Synonym of century: a period of 100 years.
3. Synonym of centennial: a hundredth anniversary.
  Quotations
  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 September, “Notes and News: The London & Blackwall Cable Railway”, in Railway Magazine, pages 424–425
4. (uncommon) Synonym of hundredweight, especially (historical) in Greek and Roman contexts.
5. (historical) Synonym of centgrave: a position in the Frankish Empire overseeing local administration.
6. (historical) Synonym of hundredman: a position in the Anglo-Saxon kingdoms overseeing local administration.
7. (obsolete) Synonym of hundred: a collection of 100 things.
8. (obsolete, rare) Synonym of centenarian: a person 100 or more years old.
verb
third-person singular simple present centenaries, present participle centenarying, simple past and past participle centenaried
1. (transitive, intransitive, obsolete) To celebrate the centennial of.