(1):

(n.) A period of a hundred years; as, this event took place over two centuries ago.

(2):

(n.) A hundred; as, a century of sonnets; an aggregate of a hundred things.

(3):

(n.) A division of the Roman people formed according to their property, for the purpose of voting for civil officers.

(4):

(n.) One of sixty companies into which a legion of the army was divided. It was Commanded by a centurion.