groundspeed

or ground speed

[ ground-speed ]

noun

1. the speed of an aircraft with reference to the ground. ground.

groundspeed

/ ˈɡraʊndˌspiːd /

noun

1. See airspeed
   the speed of an aircraft relative to the ground Compare airspeed

Word History and Origins

Origin of groundspeed¹

First recorded in 1915–20; ground ¹ + speed