adverb
- By bad luck.
- usage: "unfortunately it rained all day"; "alas, I cannot stay"
- synonyms: unfortunately, unluckily, alas
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). regrettably. Retrieved September 20, 2026, from http://smartdefine.org/regrettably/definitions/1253100 |
| Chicago | WordNet. 2010. "regrettably" http://smartdefine.org/regrettably/definitions/1253100 (accessed September 20, 2026). |
| Harvard | WordNet 2010, regrettably, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/regrettably/definitions/1253100>. |
| MLA | WordNet. "regrettably" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/regrettably/definitions/1253100> |