A condition in which there is very little net gravitational force, as of a free-falling object, an orbit, or interstellar space.
A minute shift in gravity that can occur through geologic factors in a region, such as the movement of the earth's crust along fault lines.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.