'Lethal' definitions:

Definition of 'lethal'

From: WordNet
adjective
Of an instrument of certain death; "deadly poisons"; "lethal weapon"; "a lethal injection" [syn: deadly, lethal]

Definition of 'Lethal'

From: GCIDE
  • Lethal \Leth"al\ (l[e^]th"[a^]l), n. [Lauric + ether + alcohol.] (Chem.) One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid. It is so called because it occurs in the ethereal salt of lauric acid. [1913 Webster]

Definition of 'Lethal'

From: GCIDE
  • Lethal \Le"thal\ (l[=e]"thal), a. [L. lethalis, letalis, fr. lethum, letum, death: cf. F. l['e]thal.] Deadly; mortal; fatal. "The lethal blow." --W. Richardson. -- {Le"thal*ly}, adv. [1913 Webster]