noun
- A large knife with one or more folding blades.
- synonyms: clasp knife
- A dive in which the diver bends to touch the ankles before straightening out.
verb
- Dive into the water bending the body at the waist at a right angle, like a jackknife. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). jackknife. Retrieved September 20, 2026, from http://smartdefine.org/jackknife/definitions/1190518 |
| Chicago | WordNet. 2010. "jackknife" http://smartdefine.org/jackknife/definitions/1190518 (accessed September 20, 2026). |
| Harvard | WordNet 2010, jackknife, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/jackknife/definitions/1190518>. |
| MLA | WordNet. "jackknife" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/jackknife/definitions/1190518> |