transonic definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
designating, of, or moving at a speed within the range of change from subsonic to supersonic speed
Origin: tran(s)- plush sonic
transonic definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Of or relating to aerodynamic flow or flight conditions at speeds near the speed of sound.
Origin: tran(s)- + sonic.
transonic - Science Definition