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bicentennial

The definition of bicentennial is something that happens every 200 years, the 200-year anniversary of something happening, or something that lasts for 200 years.

(adjective)

An example of a bicentennial is 1976, the 200 year anniversary of when the United States was founded; the bicentennial anniversary.

See bicentennial in Webster's New World College Dictionary

adjective

happening once in a period of 200 years
lasting 200 years
of a 200th anniversary

noun

a 200th anniversary or its commemoration

See bicentennial in American Heritage Dictionary 4

adjective

Happening once every 200 years.
Lasting for 200 years.
Relating to a 200th anniversary.

noun

A 200th anniversary or its celebration. Also called bicentenary.

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