Meaning of “century” - Learner’s Dictionary

century

noun [ C ] us uk /ˈsenʃəri/
Extra Examples
It was built in the late nineteenth century.The house is modelled on a 16th century castle.The twentieth century brought about revolutionary changes in our lifestyles.The world has changed fundamentally over the last century.The castle dates from the 11th century.

A2 a period of 100 years, especially used in giving dates:

the twentieth century

(Definition of “century” from the Cambridge Learner’s Dictionary © Cambridge University Press)