Dictionary
bi•cen•ten•ni•al
Pronunciation: (bī"sen-ten'ē-ul), [key]—
adj.
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.
—
n.
1. a 200th anniversary:
The United States had its bicentennial in 1976.
2. a celebration of such an anniversary.
Also, esp. Brit.,bicentenary.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.