from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A condition in which there is very little net gravitational force, as of a free-falling object, an orbit, or interstellar space.
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A state of very low acceleration between two free floating objects, as found in sustained freefall, in orbit, or in interstellar space.
micro- + gravity (Wiktionary)