noun
- A writing implement with a point from which ink flows.
- An enclosure for confining livestock.
- A portable enclosure in which babies may be left to play.
- synonyms: playpen
- A correctional institution for those convicted of major crimes.
- synonyms: penitentiary
- Female swan.
verb
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). pen. Retrieved September 21, 2026, from http://smartdefine.org/pen/definitions/1196844 |
| Chicago | WordNet. 2010. "pen" http://smartdefine.org/pen/definitions/1196844 (accessed September 21, 2026). |
| Harvard | WordNet 2010, pen, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/pen/definitions/1196844>. |
| MLA | WordNet. "pen" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/pen/definitions/1196844> |