(n): any specific behavior
(n): a musical composition for one voice or instrument (with or without accompaniment)
(n): a musical work that has been created
(n): a flight in which the aircraft pilot is unaccompanied
(n): an instance of traveling by air
(v): fly alone, without a co-pilot or passengers
(v): operate an airplane
(v): perform a piece written for a single instrument
(v): give a performance (of something)