to rub hard with something rough, as sand or bristol brick, especially for the purpose of cleaning; to clean by friction; to make clean or bright; to cleanse from grease, dirt, etc., as articles of dress.-to purge; as, to scour a horse.-to remove by rubbing or cleansing; to sweep along or off; to carry away or remove, as by a current of water; -- often with off or away.-to pass swiftly over; to brush along; to traverse or search thoroughly; as, to scour the coast.-to clean anything by rubbing.-to cleanse anything.-to be purged freely; to have a diarrhoea.-to run swiftly; to rove or range in pursuit or search of something; to scamper.-diarrhoea or dysentery among cattle.