Eggcorn of en masse.

In a single body or group; as one, together.

Alternative form of en masse

A noun that normally cannot be counted.

The starvation of a large proportion of a region's population due to drought, warfare, famine or similar events.

(aerospace) The total mass of the burnt fuel etc. ejected from a rocket to provide thrust.

(physics, chemistry) A conservation law of classical physics that states that the total mass of a closed system remains constant regardless of the chemical or physical changes that take place within it.

Any means of public communication that reaches a large audience.

Of a product: produced in large numbers, and designed to appeal to many different people.

plural of mass noun