[ 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.
Related formsbi·cen·ten·ni·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for bicentennials
Online Etymology Dictionary, © 2010 Douglas Harper