Stench \Stench\, n. [AS. stenc a strong smell, fr. stincan. See {Stink}, v. i.] 1. A smell; an odor. [Obs.] Clouds of savory stench involve the sky. --Dryden. 2. An ill smell; an offensive odor; a stink. --Cowper. {Stench trap}, a contrivance to prevent stench or foul air from rising from the openings of sewers, drains, etc.