Definition of mass
- Sunday masses held at three different hours
- Bach's Mass in B Minor
A large crowd of demonstrators massed outside the courthouse.
Clouds were massing on the horizon.
The generals massed their troops.
Television is a mass medium.
: to form or gather into a large group
: involving, affecting, or designed for many people
What made you want to look up mass? Please tell us where you read or heard it (including the quote, if possible).
to emit the high shrill tone of bagpipes
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