The location of a point on the Earth's surface that can be expressed by a grid reference such as latitude and longitude.
A location in geographic space given with respect to a known origin and standard measurement system, such as a coordinate system.
Absolute location is the actual spot on the planet where something is. A good example would be the longitude and latitude of a place. For instance, Lake Maracaibo of Venezuela is at 1039° N longitude and 7136°' W latitude.