sesquicentennial

[ses-kwi-sen-ten-ee-uhl]

adjective

1. pertaining to or marking the completion of a period of 150 years.

noun

1. a 150th anniversary or its celebration.

sesquicentennial

/ ˌsɛskwɪsɛnˈtɛnɪəl /

adjective

1. of or relating to a period of 150 years

noun

1. a period or cycle of 150 years

2. a 150th anniversary or its celebration

Other Word Forms

• sesquicentennially adverb

Word History and Origins

Origin of sesquicentennial¹

An Americanism dating back to 1875–80; sesqui- + centennial

Example Sentences

It’s the sesquicentennial of Western Australia, and everyone on Tony and Judy’s cul de sac is excited.

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“Few restaurants last 50 years, let alone 150,” The New York Times wrote about Tadich in 1999, the restaurant’s sesquicentennial year.

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Upcoming “celebration nights” recognize Ireland and Israel, Filipino and Hispanic heritages, and the sesquicentennial of baseball in Japan.

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At age 17, he was shot in the face during a reenactment of a Civil War raid at a town sesquicentennial celebration, where one actor apparently used a real bullet instead of a blank cartridge.

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Davis began working for the park service in 1990 and received the National Park Service Southeast Region’s Employee of the Year award in 2012 for her efforts with the Civil War sesquicentennial.

Read more on Washington Times