(n.) A board or piece of wood or metal, having one edge perfectly straight, -- used to ascertain whether a line is straight or a surface even, and for drawing straight lines.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). straightedge. Retrieved September 21, 2026, from http://smartdefine.org/straightedge/definitions/2066895 |
| Chicago | Webster's. 2011. "straightedge" http://smartdefine.org/straightedge/definitions/2066895 (accessed September 21, 2026). |
| Harvard | Webster's 2011, straightedge, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/straightedge/definitions/2066895>. |
| MLA | Webster's. "straightedge" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/straightedge/definitions/2066895> |