test-fly

[ test-flahy ]
/ ˈtɛstˌflaɪ /

verb (used with object), test-flew, test-flown, test-fly·ing.

to fly (an aircraft or spacecraft) for the evaluation of performance.

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Origin of test-fly

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020