verb
- Open involuntarily.
- usage: "His mouth dropped open"; "Her jaw dropped"
- synonyms: drop open
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). fall open. Retrieved September 20, 2026, from http://smartdefine.org/fall_open/definitions/1274443 |
| Chicago | WordNet. 2010. "fall open" http://smartdefine.org/fall_open/definitions/1274443 (accessed September 20, 2026). |
| Harvard | WordNet 2010, fall open, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/fall_open/definitions/1274443>. |
| MLA | WordNet. "fall open" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/fall_open/definitions/1274443> |