[ bahy-sen-ten-ee-uh l ]
/ ˌbaɪ sɛnˈtɛn i əl /


pertaining to or in honor of a 200th anniversary: bicentennial celebration; a bicentennial exposition.
consisting of or lasting 200 years: a bicentennial period.
occurring every 200 years: the bicentennial return of a comet.


a 200th anniversary: The United States had its bicentennial in 1976.
a celebration of such an anniversary.
Also especially British, bicentenary.

Origin of bicentennial

First recorded in 1880–85; bi-1 + centennial
Related formsbi·cen·ten·ni·al·ly, adverb

Usage note

See bi-1. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bicentennial

Word Origin and History for bicentennial


also bi-centennial, 1843 (adj.), 1871 (noun), American English, from bi- + centennial (q.v.). In rivalry with bicentenary (1831) which seems to have been the more common word in Britain.

Online Etymology Dictionary, © 2010 Douglas Harper