Main Entry: fly·by

Pronunciation: \ˈflī-ˌbī\

Function: noun

Inflected Form(s): 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