Scour \Scour\, v. i. 1. To clean anything by rubbing. --Shak. [1913 Webster] 2. To cleanse anything. [1913 Webster] Warm water is softer than cold, for it scoureth better. --Bacon. [1913 Webster] 3. To be purged freely; to have a diarrh[oe]a. [1913 Webster] 4. To run swiftly; to rove or range in pursuit or search of something; to scamper. [1913 Webster] So four fierce coursers, starting to the race, Scour through the plain, and lengthen every pace. --Dryden. [1913 Webster]