semi·​cen·​ten·​ni·​al ˌse-mē-sen-ˈte-nē-əl How to pronounce semicentennial (audio)
: a 50th anniversary or its celebration
semicentennial adjective

Examples of semicentennial in a Sentence

Recent Examples on the Web The organization celebrated its semicentennial at a gala in New York City this month. Jillian Eugenios, NBC News, 11 Mar. 2023 An outdoor rock ’n’ roll show featuring local Wilmette bands took center stage Saturday night, all part of a celebration of the semicentennial of the Centennial Recreation Complex. Gina Grillo, Chicago Tribune, 15 Aug. 2022 This season, Wolf Trap in Vienna, Va., returns to the scene to celebrate the semicentennial of the Filene Center. Washington Post, 9 June 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'semicentennial.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1859, in the meaning defined above

Time Traveler
The first known use of semicentennial was in 1859

Dictionary Entries Near semicentennial

Cite this Entry

“Semicentennial.” Dictionary, Merriam-Webster, Accessed 3 Oct. 2023.

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