1. Gravity is the universal force of attraction between material bodies—especially that force evidenced by the earth’s drawing of bodies toward its center, causing them to have weight.
2. It is the rate at which a free-falling mass accelerates in a vacuum at the earth’s surface; equal to 9.802 meters per second per second (m/s2). Abbreviation, g.
3. It is the rate at which a free-falling mass accelerates in a vacuum in the vicinity, or at the surface, of an astronomical object, such as a planet or star.
See also, Geomagnetism, Magnetic Repulsion, Magnetic Attraction