Definition of "quadricentennial" []

• Quadricentenary. (adjective)
• A quadricentenary event or celebration. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "What US state has the word "quadricentennial" on its state quarter?"
• "Founded in 1609, New York is celebrating its quadricentennial by defying the odds and predictions of economic doom: just walk around Times Square any day of the week, at any hour of the day, and you\'re going to see hordes of happy tourists."
• "Founded in 1609, New York is celebrating its quadricentennial by defying the odds and predictions of economic doom: just walk around Times Square any day of the week, at any hour of the day, and you're going to see hordes of happy tourists."