(nautical) An extra curve of material added to the leech (aft edge) of a sail to increase the sail area. / A kind of headdress worn by some of the indigenous peoples of North America.

(US) A cockroach.

Species in the genus Rutilus, especially: / The California roach, of the monotypic genus Hesperoleucus

(UK, obsolete, mining) A bed or stratum of some mineral. / (UK, regional) Gritty or coarse rock; especially Portland stone or similar limestone.

(transitive) To cut or shave off the mane of a horse so that the remaining hair stands up on the neck. / (transitive, by extension) To cut a person's hair so that it stands straight up.

(US, slang, smoking) Marijuana; cannabis used as a drug. / (US, slang, smoking) A butt of a marijuana cigarette, blunt, or joint.

(US) Having a style of trimming a horse's mane so that the hair stands straight up from the neck, similar to the natural growth pattern of a zebra's mane, or a mohawk haircut on a human.

simple past tense and past participle of roach

plural of roach

A surname. / The River Roach, a river in Essex, England, which is a stream before becoming a tidal river and and joining the River Crouch.