noun
- A stock or bond that is not registered with the Securities and Exchange Commission and cannot be sold in the public market. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). letter security. Retrieved September 22, 2026, from http://smartdefine.org/letter_security/definitions/1243176 |
| Chicago | WordNet. 2010. "letter security" http://smartdefine.org/letter_security/definitions/1243176 (accessed September 22, 2026). |
| Harvard | WordNet 2010, letter security, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/letter_security/definitions/1243176>. |
| MLA | WordNet. "letter security" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/letter_security/definitions/1243176> |