noun
- An abnormal condition in which an older child or adult retains infantile characteristics.
- Infantile behavior in mature persons. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). infantilism. Retrieved September 20, 2026, from http://smartdefine.org/infantilism/definitions/1191890 |
| Chicago | WordNet. 2010. "infantilism" http://smartdefine.org/infantilism/definitions/1191890 (accessed September 20, 2026). |
| Harvard | WordNet 2010, infantilism, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/infantilism/definitions/1191890>. |
| MLA | WordNet. "infantilism" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/infantilism/definitions/1191890> |