
 In baseball, the rules state that a batted ball is considered in flight when it has not yet touched any object other than a fielder or his equipment. Once a batted ball touches the ground, a fence or wall, a foul pole, a base, the pitcher`s rubber, an umpire, or a baserunner, it is no longer in flight. A batted ball that passes entirely out of th....
Found on 
http://en.wikipedia.org/wiki/In_flight

Any time from the moment all the external doors of an aircraft are closed following embarkation until the moment when any such door is opened for disembarkation. In the case of a forced landing the flight shall be deemed to continue until competent authorities take over the responsibility for the aircraft and the persons and property on board. USC ...
Found on 
http://www.lectlaw.com/def/i019.htm

[
adv] - flying through the air
Found on 
http://www.webdictionary.co.uk/definition.php?query=in%20flight
 on the wing adverb
on the wing adverb flying through the air; `we saw the ducks in flight`
Found on 
https://www.encyclo.co.uk/local/20974

done, served, or shown during an air voyage: an in-flight movie.
Found on 
https://www.infoplease.com/dictionary/in-flight
  No exact match found.