Origin: F. Saillie, fr. Sailir. See Sally.
2. A rushing or bursting forth; a quick issue; a sudden eruption; specifically, an issuing of troops from a place besieged to attack the besiegers; a sortie. Sallies were made by the Spaniards, but they were beaten in with loss. (bacon)
3. An excursion from the usual track; range; digression; deviation. Every one shall know a country better that makes often sallies into it, and traverses it up and down, than he that . . . Goes still round in the same track. (locke)
(Science: astronomy) A large port on each quarter of a fireship, for the escape of the men into boats when the train is fired; a large port in an old-fashioned three-decker or a large modern ironclad.