noun
decade
DEK-ayd/ˈdekeɪd/
A group or period of ten units.
These ten calendars represent the decade from 2010 through 2019.
Etymology
Greek dekas meant a group of ten, not specifically ten years. English first used decade for ten parts of something; the familiar meaning arose by applying that grouping to consecutive years.
In context
First, let's take a trip back to the 1990s. The decade defined by the internet revolution
More examples
- She has worked at the library for a decade.
- The town has changed dramatically over the past three decades.
- Each decade of the rosary includes ten Hail Marys.
Forms
decade · decades
decadal adjective — Relating to a period of ten years.