- (n.) The dog grass. See under Dog.
- (n.) a common weed with jointed stems (Polygonum aviculare); knotweed.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). knotgrass. Retrieved September 22, 2026, from http://smartdefine.org/knotgrass/definitions/2025772 |
| Chicago | Webster's. 2011. "knotgrass" http://smartdefine.org/knotgrass/definitions/2025772 (accessed September 22, 2026). |
| Harvard | Webster's 2011, knotgrass, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/knotgrass/definitions/2025772>. |
| MLA | Webster's. "knotgrass" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/knotgrass/definitions/2025772> |