centenary

/ˈsɛntəˌnɛri/

Other forms: centenaries

A centenary is the hundredth anniversary of some event. When your great grandfather turns 100, his birthday party will be the centenary of his birth.

If your town is celebrating its centenary, that means it's exactly 100 years old. You can also use this word as an adjective, to describe something that's been around for a hundred years: "The orchestra's centenary concert will happen next summer." Centenary comes from the Latin centum, "hundred," which is also the root of its synonym, centennial.

Definitions of centenary

1. noun

   the 100th anniversary (or the celebration of it)
   synonyms: centennial

   type of:

   anniversary, day of remembrance

   the date on which an event occurred in some previous year (or the celebration of it)
2. adjective

   of or relating to or completing a period of 100 years
   synonyms: centennial