tach 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.
tach definition by American Heritage Dictionary
Variant of tache
Archaic a device, as a buckle, hook and eye, etc., for fastening two parts together
Origin: Middle English ; from Middle French a nail ; from Old French estache: see attach