centennial

[sen-ten-ee-uh l] /sɛnˈtɛn i əl/

adjective

pertaining to, or marking the completion of, a period of 100 years.

pertaining to a 100th anniversary.

lasting 100 years.

100 years old.

noun

a 100th anniversary or its celebration; centenary.

Origin

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

Related forms

centennially, adverb

precentennial, adjective

Can be confused

centenary, centennial.

Examples from the web for centennial

Doc, they built a dome to prepare for the centennial.
Celebrations around the world are happening this summer to commemorate the centennial.
As part of the centennial celebration, seven legacy projects were planned and funding secured for five.
In the zipcode directory, centennial addresses are listed under those three cities.
At the centennial, there was a beer drinking contest and a beard growing contest.

British Dictionary definitions for centennial

centennial

/sɛnˈtɛnɪəl/

adjective

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

occurring every 100 years

noun

(mainly US & Canadian) another name for centenary

Derived Forms

centennially, adverb

Word Origin

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

Word Origin and History for centennial

adj.

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