noun
- A person who adds numbers.
- A machine that adds numbers.
- Small terrestrial viper common in northern Eurasia.
- synonyms: common viper, Vipera berus
adverb
- In the Christian era; used before dates after the supposed year Christ was born.
- usage: "in AD 200"
- synonyms: AD, A. D., anno Domini
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). adder. Retrieved September 21, 2026, from http://smartdefine.org/adder/definitions/1196324 |
| Chicago | WordNet. 2010. "adder" http://smartdefine.org/adder/definitions/1196324 (accessed September 21, 2026). |
| Harvard | WordNet 2010, adder, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/adder/definitions/1196324>. |
| MLA | WordNet. "adder" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/adder/definitions/1196324> |