Centenary

a.	1.	Relating to, or consisting of, a hundred.
	2.	Occurring once in every hundred years; centennial.
n.	1.	The aggregate of a hundred single things; specifically, a century.
	2.	A commemoration or celebration of an event which occurred a hundred years before.

Noun	1.	centenary - the 100th anniversary (or the celebration of it) Synonyms: centennial
Adj.	1.	centenary - of or relating to or completing a period of 100 years; "centennial celebration" Synonyms: centennial

centennial, century