Definition of centennialize in English:

centennialize

verb

(also centennialise)
rare US
  • To mark the centenary of; = centenarize . Formerly also without object: †to celebrate a centenary (obsolete).

Pronunciation

centennialize

/sɛnˈtɛnɪəlʌɪz/ /s(ə)nˈtɛnɪəlʌɪz/

Origin

Late 19th century. From centennial + -ize.