CENTENNIAL
centennial, centenary
(adjective) of or relating to or completing a period of 100 years; “centennial celebration”
centennial, centenary
(noun) the 100th anniversary (or the celebration of it)
Source: WordNet® 3.1
Proper noun
Centennial
A city in Colorado.
A census-designated place in Wyoming.
Etymology
Adjective
centennial (not comparable)
Relating to, or associated with, the commemoration of an event that happened a hundred years before.
Happening once in a hundred years.
Lasting or aged a hundred years.
Noun
centennial (plural centennials)
The hundredth anniversary of an event or happening.
Source: Wiktionary
Cen*ten"ni*al, a. Etym: [L. centum a hundred + annus year.]
1. Relating to, or associated with, the commemoration of an event
that happened a hundred years before; as, a centennial ode.
2. Happening once in a hundred years; as, centennial jubilee; a
centennial celebration.
3. Lasting or aged a hundred years.
Thet opened through long lines Of sacred ilex and centennial pines.
Longfellow.
Cen*ten"ni*al, n.
Definition: The celebration of the hundredth anniversary of any event; a
centenary. [U. S.]
Source: Webster’s Unabridged Dictionary 1913 Edition