Sometimes, decade means a group of ten things or people. For example, ten players or ten objects together.
The team is made of two decades of players.
She counted a decade of pencils in the box.
People use decade to talk about a specific ten-year time with special events or styles. For example, 'the eighties' means 1980 to 1989.
The 1960s was a decade of music and change.
Fashion from the decade is popular again.
In some religions, a decade means ten prayers spoken together as a group. For example, in the Catholic Rosary, one decade is a set of ten Hail Mary prayers.
She prayed a decade of the Rosary today.
Each decade has ten Hail Mary prayers.
Scientists use decade to mean a specific ten-year period for study or measurement. This helps them see changes over time.
Climate data is averaged over a decade.
The study covers a decade of ice core samples.