centennial
//sɛnˈtɛniəl//
Noun
centennialSingular
centennialsPlural
1
A 100th anniversary or its celebration.
The city is planning a grand parade for its centennial.
Adjective
centennialCanonical form
1
Relating to or marking a period of 100 years or a 100th anniversary.
The museum is hosting a centennial exhibition to celebrate its founding.