Someone who commits a mass murder.

The formalities that accompany a mass burial

Burial of multiple bodies in a mass grave

A large-scale transportation system in which the passengers do not travel in their own vehicles.

The process of manufacturing products on a large scale.

A device used in mass spectrometry to discover the mass spectrum of a given substance.

(classical mechanics) A theoretical point with mass assigned to it.

(computer hardware) Any form of persistent data storage technology with high capacity relative to that of the high-speed non-persistent memory of computers of its time.

popular culture

plural of mass transit