A violent collision or compression; a crash; destruction; ruin. / Violent pressure, as of a moving crowd. / A violent crowding. / A crowd that produces uncomfortable pressure. / (slang) A group or gang.

To press between two hard objects; to squeeze so as to alter the natural shape or integrity, or to force together into a mass. / To reduce to fine particles by pounding or grinding.

A more solid, dense or hard layer on a surface or boundary. / The external, hardened layer of certain foodstuffs, including most types of bread, fried meat, etc. / An outer layer composed of pastry

(transitive) To cover with a crust. / (intransitive) To form a crust.

(historical) A fighter in the medieval Crusades. / (figuratively) A person engaged in a crusade.

Any arthropod of the subphylum Crustacea, including lobsters, crabs, shrimp, barnacles and woodlice.

Having a crust, especially a thick one. / (informal, figuratively, of a person or behavior) Short-tempered and gruff but, sometimes, with a harmless or benign inner nature.

(chiefly Britain, informal) A tramp or homeless young person with poor cleanliness. / (slang) Dried eye mucus.

(historical) Any of the military expeditions undertaken by the Christians of Europe in the 11th to 13th centuries to reconquer the Levant from the Muslims.

(intransitive) To go on a military crusade. / (intransitive) To make a grand concerted effort toward some purportedly worthy cause.