That flies or can fly. / Brief or hurried. / Capable of speed / (nautical, of a sail) Not secured by yards. / (nautical, of a vessel) Capable of foiling.

present participle of fly

(countable, aviation) An act of flight. / (uncountable, aerodynamics) The action or process of sustained motion through the air.

plural of flying

present participle of fly by

Alternative form of flyby

(of airspace) In which aircraft are forbidden to fly. / (of people) Who are forbidden to board an aircraft.

(baseball, of the ball) While in the air, without having touched the ground. / (idiomatic) Spontaneously or extemporaneously; done as one goes, or during another activity.

(aviation) An informal gathering of private pilots and their aircraft at a prearranged airfield.

(intransitive, baseball) To hit a fly ball; to hit a fly ball that is caught for an out. Compare ground (verb) and line (verb).