speed metal 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.
a style of heavy-metal rock music that emphasizes fast tempos, jolting rhythms, limited harmonic development, anguished and rebellious lyrics, etc.
speed metal definition by American Heritage Dictionary
Heavy metal music that is exceptionally harsh and fast. Also called thrash.