Breadcrumb Home > Dictionary > Index T test-fly: Meaning and Definition of Find definitions for: test-fly Pronunciation: (test'flī"), [key] — -flew, -flown, -fly•ing. to fly (an aircraft or spacecraft) for the evaluation of performance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: test-fly (Thesaurus) test flight testicle TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: praedial Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language