A century refers to a period of 100 years. It can also refer to:

1. A group of 100 things, such as a century of years, a century of people, or a century of achievements.
2. A century ride, which is a 100-mile bicycle ride.
3. In sports, a century can refer to a score of 100 or more points, runs, or goals.

Historically, centuries are often used to divide time into distinct blocks, such as:

- 21st century (2001-2100)
- 20th century (1901-2000)
- 19th century (1801-1900)

And so on.

Is there something specific you'd like to know about centuries?