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