I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: from fly in, v.
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
II. noun
: a gathering (as at a small airport) of flying enthusiasts who arrive by private plane