We found 12 dictionaries that define the word ground speed:

General (7 matching dictionaries)

1. ground speed: Merriam-Webster
2. ground speed: American Heritage Dictionary of the English Language
3. ground speed: Cambridge Advanced Learner's Dictionary
4. ground speed: Wiktionary
5. ground speed: Dictionary.com
6. Ground speed: Wikipedia, the Free Encyclopedia
7. ground speed: TheFreeDictionary.com

Computing (1 matching dictionary)

8. ground speed: Encyclopedia

Science (1 matching dictionary)

9. Bird On! (No longer online)

Sports (1 matching dictionary)

10. Ground speed: Skydiving Glossary

Tech (2 matching dictionaries)

11. Glossary of Meteorology (No longer online)
12. ground-speed: Chapters in the Sky

Definitions from Wiktionary (Ground speed) ▸ noun:  Alternative form of groundspeed. [(aviation) The horizontal speed of an aircraft relative to the ground.] Similar: groundspeed, airspeed, true airspeed, absolute altitude, ground crew, glide ratio, glide slope, V speed, indicated airspeed, glidepath, more... Opposite: airspeed, velocity, rate of travel ▸ Words similar to ground speed ▸ Usage examples for ground speed ▸ Idioms related to ground speed ▸ Wikipedia articles (New!) ▸ Words that often appear near ground speed ▸ Rhymes of ground speed ▸ Invented words related to ground speed