le·thal (l  th l)adj. 1. Capable of causing death. 2. Of, relating to, or causing death. See Synonyms at fatal. 3. Extremely harmful; devastating: accusations lethal to the candidate's image. [Late Latin l th lis, alteration (probably influenced by Lth, Lethe) of Latin ltlis, from ltum, death.]le·thal i·ty (l-th l -t) n.le thal·ly adv. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | lethality - the quality of being deadly fatality - the quality of being able to cause death or fatal disasters |
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