T formation 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.
Football an offensive formation with the quarterback behind the center, the fullback behind the quarterback, and a halfback at each side of the fullback
T formation definition by American Heritage Dictionary
An offensive formation in which the fullback lines up directly behind the center and the quarterback with a halfback on either side or in which two running backs line up behind the quarterback in a line parallel to the line of scrimmage.