centennial

 
Pronunciation: /sɛnˈtɛnɪəl/
chiefly North American

adjective

  • relating to a hundredth anniversary: centennial celebrations

noun

  • a hundredth anniversary: the show is a celebration of the museum’s centennial

Origin:

late 18th century: from Latin centum 'a hundred', on the pattern of biennial

Spelling help

Spell centennial with a double n and one l.