noun
- Any of numerous plants of the family Compositae and especially of the genera Carduus and Cirsium and Onopordum having prickly-edged leaves. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). thistle. Retrieved September 20, 2026, from http://smartdefine.org/thistle/definitions/1237338 |
| Chicago | WordNet. 2010. "thistle" http://smartdefine.org/thistle/definitions/1237338 (accessed September 20, 2026). |
| Harvard | WordNet 2010, thistle, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/thistle/definitions/1237338>. |
| MLA | WordNet. "thistle" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/thistle/definitions/1237338> |