[sen-ten-ee-uh l]


pertaining to, or marking the completion of, a period of 100 years.
pertaining to a 100th anniversary.
lasting 100 years.
100 years old.


a 100th anniversary or its celebration; centenary.

Nearby words

  1. centaury,
  2. centavo,
  3. centenarian,
  4. centenary,
  5. centenionalis,
  6. centennial state,
  7. center,
  8. center back,
  9. center bit,
  10. center field

Origin of centennial

1790–1800; < Latin cent- 100 (see cent) + English -ennial pertaining to a period of years (extracted from biennial)

Related formscen·ten·ni·al·ly, adverbpre·cen·ten·ni·al, adjective

Can be confusedcentenary centennial

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for centennial

British Dictionary definitions for centennial



relating to, lasting for, or completing a period of 100 years
occurring every 100 years


mainly US and Canadian another name for centenary
Derived Formscentennially, adverb

Word Origin for centennial

C18: from Latin centum hundred, on the model of biennial

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for centennial



1789, from Latin centum "one hundred" (see hundred) + ending from biennial. As a noun, "hundredth anniversary celebration," from 1876; the older noun is centenary.

Online Etymology Dictionary, © 2010 Douglas Harper