(idiomatic) An idea, narrative, suggestion, etc., which is extremely imaginative and which appears to be entirely unrealistic, untrue, or impractical; thinking which is very speculative.

(idiomatic) To begin flying; to become airborne or aloft; to take off and fly / (idiomatic) to flee

A literary passage that has no logical connection to the surrounding work, or is a long digression that becomes less and less related to the original passage.

plural of flight recorder

(aviation) The precise movement of a civil photogrammetric aircraft along a predetermined course at a predetermined altitude during the actual photographic run.

plural of flight line

A rank in the RAF, between that of flying officer and squadron leader, of a person in charge of a flight of aircraft, equivalent to a Royal Navy lieutenant or an Army captain

plural of flight feather

(ornithology) Any asymmetrical feather of the wing or tail of a bird.

(law, uncountable) The possibility that a person under the custody of law enforcement will abscond if granted bail. / (law, countable) A person who is considered likely to abscond.