Definition of flyby
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
First Known Use of flyby
FLYBY Defined for English Language Learners
Definition of flyby for English Language Learners
: a usually low flight past a group of people at an air show, during a parade, etc., by an aircraft or group of aircraft
: a flight of a spacecraft past a planet, moon, etc.
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