gravity assist(redirected from Gravitational boost)
Also found in: Encyclopedia.
Related to Gravitational boost: gravity assist
The use of the gravitational field of a moon, planet, or other moving celestial object to change a spacecraft's trajectory, especially to increase its velocity.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.