global positioning system(n = noun.artifact)gps - a navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver;
A worldwide system of electronic navigation in which a vessel, aircraft or missile determines its latitude and longitude by measuring the transmission time from several orbiting satellites. GPS is more precise than any other navigation system available, yielding position accurate within 10 meters 95% of the time. [RH]