Definition of fly in 

(Entry 1 of 2)

: to switch (a railroad car) by a flying switch

fly-in

noun

Definition of fly-in (Entry 2 of 2)

1 : an act of flying to a destination planned the fly-in of the rescue planes

2 : an outdoor theater planned for the patronage of persons remaining in their private planes — compare drive-in

3 : a gathering (as at a small airport) of flying enthusiasts who arrive by private plane

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History and Etymology for fly in

Noun

from fly in, verb

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