glide slope

WordReference Random House Unabridged Dictionary of American English © 2025

glide′ slope′, [Aeron.]

1. Aeronautics the angle that the glidepath of an aircraft or spacecraft makes with the horizontal. Also called glide′ an′gle, glid′ing an′gle. 

• 1945–50

WordReference Random House Unabridged Dictionary of American English © 2025

glide•path  (glīd′path′, -päth′), n., pl. -paths 

(-paᵺz′, -päᵺz′, -paths′, -päths′). 
1. Aeronautics, Aerospace the course followed by an aircraft or spacecraft when descending for a landing.

• glide + path 1935–40

Collins Concise English Dictionary © HarperCollins Publishers::

glidepath / ˈɡlaɪdˌpɑːθ/, glide slope noun

1. the approach path of an aircraft when landing, usually defined by a radar beam