high explosive 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.
any explosive in which the combustion of the particles is so rapid as to be virtually simultaneous throughout the mass, so that it has great shattering effect
high explosive definition by American Heritage Dictionary
An explosive, such as TNT, that combusts nearly instantaneously, thereby producing a violent, shattering effect.