/ Dictionary / Index T test flight: Meaning and Definition of Find definitions for: test' flight" Pronunciation: [key] a flight made to observe the performance characteristics of a new aircraft or spacecraft. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. testes test-fly Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language