Gully \Gul"ly\, n.; pl. {Gullies}. [Formerly gullet.] 1. A channel or hollow worn in the earth by a current of water; a short deep portion of a torrent's bed when dry. [1913 Webster] 2. A grooved iron rail or tram plate. [Eng.] [1913 Webster] {Gully gut}, a glutton. [Obs.] --Chapman. {Gully hole}, the opening through which gutters discharge surface water. [1913 Webster]