mass shooting

[ mas shoot-ing ]
/ ˈmæs ˈʃut ɪŋ /

noun

a single incident involving the shooting with one or more firearms of a number of people, but more than two and typically a large number, especially when the victims are random: There's news of a mass shooting at the stadium, with two fatalities and 25 injured.

Origin of mass shooting

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019