T square

  1. a T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along the edge of the drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc., and as a support for triangles.

Origin of T square

First recorded in 1775–85

Words Nearby T square

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use T square in a sentence

  • The full moon, Tuesday, in a T-square formation with the Sun and Neptune, urges you to balance your will with your want.

    Your Horoscopes: May 15-21 | Starsky + Cox | May 14, 2011 | THE DAILY BEAST
  • A T square, with a blade 24 inches long attached permanently to the stock, but not sunk into it.

  • I reached the chart table, almost falling over my leaden feet, seized a short permal T-square, and levered the cover up.

    Greylorn | John Keith Laumer
  • "Yes, it's a pretty good day," allowed Uncle Bart judicially as he took a squint at his T-square.

    The Story Of Waitstill Baxter | By Kate Douglas Wiggin
  • The paper should not come quite to the edge of the drawing-board, so as to interfere with the head of the T-square.

  • Never use a T-square, triangle or ruling pen in inking-in lettering.

    Letters and Lettering | Frank Chouteau Brown

British Dictionary definitions for T-square


  1. a T-shaped ruler used in mechanical drawing, consisting of a short crosspiece, which slides along the edge of the drawing board, and a long horizontal piece: used for drawing horizontal lines and to support set squares when drawing vertical and inclined lines

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012