Definition of sorties:
(n) :
An attack made by troops from a besieged position; a sally.
(n) :
(aviation) An operational flight carried out by a single military aircraft.
(n) :
(military, also attributively and figuratively)
(n) :
(by extension) An act of venturing out to do a task, etc.
(n) :
(by extension) (figuratively) An act of trying to enter a new field of activity.
(n) :
(by extension) (figuratively) (sports) An attacking move.