A group of people organized for a common purpose.

(military) Military unit composed of several regiments (or battalions) and including soldiers from different arms of service.

(derogatory) A group of people who share views or a specific characteristic.

(Internet slang) Coordinated online harassment, disruption or influencing, especially organized by an antagonistic website or community.

To form or unite into a brigade; to group together.

(Internet slang) To harass an individual or community online in a coordinated manner.