(n.) A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle or quadrilateral figure which is longer than it is broad, and with right angles.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). parallelogram. Retrieved September 20, 2026, from http://smartdefine.org/parallelogram/definitions/2042007 |
| Chicago | Webster's. 2011. "parallelogram" http://smartdefine.org/parallelogram/definitions/2042007 (accessed September 20, 2026). |
| Harvard | Webster's 2011, parallelogram, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/parallelogram/definitions/2042007>. |
| MLA | Webster's. "parallelogram" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/parallelogram/definitions/2042007> |