test pattern 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 standard pattern of lines, colors, etc. broadcast by a TV station, used to evaluate or adjust individual TV receivers for image quality
test pattern definition by American Heritage Dictionary
A geometric chart transmitted by a television station to assist viewers in adjusting reception.