Meaning of flyby

fly•by

Pronunciation: (flī'bī"), [key]
— pl. -bys.
  1. the flight of a spacecraft close enough to a celestial object, as a planet, to gather scientific data.
    1. Also calledflypast.a low-altitude flight of an aircraft for the benefit of ground observers.
    2. flyover (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.