- (n.) Any one of several aquatic, wed-footed, northern birds of the genus Urinator (formerly Colymbus), noted for their expertness in diving and swimming under water. The common loon or great northern diver (Urinator imber or Colymbus torquatus), and the red-throated loon or diver (U. septentrionalis), are the best known species. See Diver.
- (n.) A sorry fellow; a worthless person; a rogue.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). loon. Retrieved September 21, 2026, from http://smartdefine.org/loon/definitions/2028824 |
| Chicago | Webster's. 2011. "loon" http://smartdefine.org/loon/definitions/2028824 (accessed September 21, 2026). |
| Harvard | Webster's 2011, loon, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/loon/definitions/2028824>. |
| MLA | Webster's. "loon" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/loon/definitions/2028824> |