- (a.) Having or consisting of, two superposed planes, aerocurves or the like; of or pertaining to a biplane; as, a biplane rudder.
- (n.) An aeroplane with two main supporting surfaces one above the other.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Biplane. Retrieved September 21, 2026, from http://smartdefine.org/biplane/definitions/1980464 |
| Chicago | Webster's. 2011. "Biplane" http://smartdefine.org/biplane/definitions/1980464 (accessed September 21, 2026). |
| Harvard | Webster's 2011, Biplane, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/biplane/definitions/1980464>. |
| MLA | Webster's. "Biplane" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/biplane/definitions/1980464> |