noun
- An additional telephone set that is connected to the same telephone line.
- synonyms: extension, extension phone
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). telephone extension. Retrieved September 21, 2026, from http://smartdefine.org/telephone_extension/definitions/1315433 |
| Chicago | WordNet. 2010. "telephone extension" http://smartdefine.org/telephone_extension/definitions/1315433 (accessed September 21, 2026). |
| Harvard | WordNet 2010, telephone extension, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/telephone_extension/definitions/1315433>. |
| MLA | WordNet. "telephone extension" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/telephone_extension/definitions/1315433> |