We found 5 dictionaries that define the word test-flown:

General (4 matching dictionaries)

1. test-flown: Merriam-Webster
2. test-flown, test-flown: Collins English Dictionary
3. test-flown: Dictionary.com
4. test-flown: TheFreeDictionary.com

Computing (1 matching dictionary)

5. test-flown: Encyclopedia

(Note: See test-fly as well.)

Definitions from Wiktionary (test-fly) ▸ verb:  To fly an aircraft in order to evaluate its performance ▸ Also see test-fly ▸ Words similar to test-flown ▸ Usage examples for test-flown ▸ Idioms related to test-flown ▸ Wikipedia articles (New!) ▸ Words that often appear near test-flown ▸ Rhymes of test-flown ▸ Invented words related to test-flown