what is lethal effect
1. of or causing death; deadly; fatal: a lethal weapon; a lethal dose. 2. made to cause death: a lethal injection.3. causing great harm; disastrous: The disclosures were lethal to his candidacy.lÄtÄlis, lÄthalis, derivative of lÄtum death]. syn: See fatal.dj. 1. Causing or capable of causing death: a lethal weapon. See Synonyms at fatal. 2. Extremely harmful; devastating: accusations lethal to the candidate's image.