n.
Pronunciation: ' fl ī - ˌ b ī
Function: noun
Inflected Form: plural flybys
Date: 1953
1 : a prearranged usually low-altitude flight by one or more airplanes over a public gathering (as an air show)
2 a : a flight of a spacecraft past a celestial body (as Mars) close enough to obtain scientific data b : a spacecraft that makes a flyby