Definition of flyby
1 : a prearranged usually low-altitude flight by one or more airplanes over a public gathering (such as an air show)
2a : a flight of a spacecraft past a celestial body (such as Mars) close enough to obtain scientific datab : a spacecraft that makes a flyby
Recent Examples of flyby from the Web
After a close flyby, the Juno spacecraft has sent back the first close-up images of what planet's southern lights?
New Frontiers missions like Juno and New Horizons are set to stay on target, meaning New Horizons is funded for a 2019 flyby of the Kuiper belt object 2014 MU69, and Juno is fit to continue studying Jupiter.
The second Earth gravity-assist flyby would nudge the probe into an orbit with a period of 1.61 years and place it on course for a close encounter with Comet Borrelly on 25 December 1987.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flyby'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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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