noun

1: a large body of matter with no definite shape.

“the sun broke out from behind a mass of clouds”

synonyms:
pile, heap, stack, clump, cloud, bunch, bundle, lump

2: a large number of people or objects crowded together.

“a mass of cyclists”

synonyms:
large number, abundance, profusion, multitude, group, crowd, mob,rabble, horde,

barrage, throng, huddle, host, troop, army, herd, flock,drove, swarm, pack, press,

crush, mountain, flood

“a mass of cyclists”

adjective

1: involving or affecting large numbers of people or things.

“the film has mass appeal”

synonyms:

wholesale, universal, widespread, general, large-scale, extensive, pandemic

“mass hysteria”

verb

1: assemble or cause to assemble into a single body or mass.

“both countries began massing troops in the region”

synonyms:

accumulate, assemble, amass, collect, gather, gather together, draw together, join together