noun
- An odorless very poisonous gas that is a product of incomplete combustion of carbon.
- synonyms: carbon monoxide, carbon monoxide gas
- A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition.
- synonyms: cobalt, atomic number 27
- One who refuses to serve in the armed forces on grounds of conscience.
- synonyms: conscientious objector
- A state in west central United States in the Rocky Mountains.
- synonyms: Colorado, Centennial State
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). co. Retrieved September 20, 2026, from http://smartdefine.org/co/definitions/1266207 |
| Chicago | WordNet. 2010. "co" http://smartdefine.org/co/definitions/1266207 (accessed September 20, 2026). |
| Harvard | WordNet 2010, co, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/co/definitions/1266207>. |
| MLA | WordNet. "co" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/co/definitions/1266207> |