Definition of quadricentennial in English:

quadricentennial

noun

  • A four-hundredth anniversary; a celebration of such an anniversary.

adjective

  • Of or relating to a four-hundredth anniversary.

Origin

Late 19th century; earliest use found in The Standard. From quadri- + centennial.

Pronunciation

quadricentennial

/ˌkwɒdrɪsɛnˈtɛnɪəl/