We found 16 dictionaries that define the word groundspeed:

General (12 matching dictionaries)

1. groundspeed: Oxford Learner's Dictionaries
2. groundspeed: Collins English Dictionary
3. groundspeed: Vocabulary.com
4. groundspeed: Wiktionary
5. groundspeed: Webster's New World College Dictionary, 4th Ed.
6. groundspeed: Infoplease Dictionary
7. groundspeed: Dictionary.com
8. Groundspeed: Wikipedia, the Free Encyclopedia
9. groundspeed: Rhymezone
10. groundspeed: FreeDictionary.org
11. groundspeed: Mnemonic Dictionary
12. groundspeed: TheFreeDictionary.com

Computing (1 matching dictionary)

13. groundspeed: Encyclopedia

Sports (1 matching dictionary)

14. Groundspeed: Sports Definitions

Tech (2 matching dictionaries)

15. groundspeed: Chapters in the Sky
16. Dictionary for Avionics (No longer online)

(Note: See groundspeeds as well.)

Definitions from Wiktionary (groundspeed) ▸ noun:  (aviation) The horizontal speed of an aircraft relative to the ground. Similar: ground stop, standard gravity, acceleration of gravity, ground power, GBAS, groundage, gamma, grounde, general aviation, grav, more... Opposite: airspeed, velocity, rate of air travel ▸ Words similar to groundspeed ▸ Usage examples for groundspeed ▸ Idioms related to groundspeed ▸ Wikipedia articles (New!) ▸ Popular adjectives describing groundspeed ▸ Words that often appear near groundspeed ▸ Rhymes of groundspeed ▸ Invented words related to groundspeed