The Collaborative International Dictionary
Glide slope \Glide slope\, n. (Aeronautics)
the proper path for an airplane approaching a landing strip; also called glide path.
The path indicated by a radio beacon as the proper path for an airplane to use in approaching a landing strip.
WordNet
n. the final path followed by an aircraft as it is landing [syn: approach path, approach, glide slope]
Wikipedia
Glide Path is a novel by Arthur C. Clarke, published in 1963. Clarke's only non- science fiction novel, it is set during World War II, and tells a fictionalized version of the development of the radar-based ground-controlled approach (called "ground-controlled descent" in the novel) aircraft landing system, and includes a character modeled on Luis Alvarez, who developed this system. It is based on Clarke's own wartime service with the Royal Air Force, during which he worked on the GCA project.
Usage examples of "glide path".
Now the last stages of the approach could be watched on a greatly exaggerated scale, so that the slightest deviations from the glide path were clearly visible.
But the meters indicated that it was still above the glide path, so he must have been misled by the great enlargement of the picture.
The reflected underground image was almost as bright as the direct one crawling down the glide path, and as they came closer and closer together he saw that this was not merely a pretty proof of the laws of radio propagation.
It was too late now to climb back to the proper glide path, but the Controller could sweat that one out.