- (a.) Not having a letter.
- (a.) Illiterate.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). letterless. Retrieved September 22, 2026, from http://smartdefine.org/letterless/definitions/2027506 |
| Chicago | Webster's. 2011. "letterless" http://smartdefine.org/letterless/definitions/2027506 (accessed September 22, 2026). |
| Harvard | Webster's 2011, letterless, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/letterless/definitions/2027506>. |
| MLA | Webster's. "letterless" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/letterless/definitions/2027506> |