The definition of a T square is a t-shaped ruler with a thick piece at one end that can slide on an edge used for making straight, parallel lines.noun
An example of a T square is what an architect would use on their draft table when making straight lines in a building design.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a -shaped ruler with a short, thick crosspiece that fits over the edge of a drawing board, used in drawing parallel lines
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A rule having a short, sometimes sliding, perpendicular crosspiece at one end, used by drafters for establishing and drawing parallel lines.
(click for a larger image)