bicentennial

[bahy-sen-ten-ee-uhl]
adjective
1.
pertaining to or in honor of a 200th anniversary: bicentennial celebration; a bicentennial exposition.
2.
consisting of or lasting 200 years: a bicentennial period.
3.
occurring every 200 years: the bicentennial return of a comet.
noun
4.
a 200th anniversary: The United States had its bicentennial in 1976.
5.
a celebration of such an anniversary.
Also, especially British, bicentenary.


Origin:
1880–85; bi-1 + centennial

bicentennially, adverb


See bi-1.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bicentenary or (US) bicentennial (ˌbaɪsɛnˈtiːnərɪ, ˌbaɪsɛnˈtɛnɪəl)
 
adj
1.  marking a 200th anniversary
2.  occurring every 200 years
3.  lasting 200 years
 
n , -naries
4.  a 200th anniversary
 
bicentennial or (US) bicentennial
 
adj
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

bicentennial
also, in 19c., bi-centennial; 1843 (adj.), 1871 (noun), Amer.Eng., 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
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Example sentences
But in this bicentennial year a flood is turning into a torrent.
Celebrate the bicentennial of this great expedition by taking a virtual hike along the explorers' route.
The sad bicentennial of a once fabulous sugar colony.
But the bicentennial fuss has little to do with what actually happened two centuries ago.
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