deadly meaning and definition

DEADLY adjective

Definition of deadly (adjective)

1. causing or capable of causing death
   • "a fatal accident"; "a deadly enemy"; "mortal combat"; "a mortal illness"
   • synonyms: deathly, mortal
2. of an instrument of certain death
   • "deadly poisons"; "lethal weapon"; "a lethal injection"
   • synonyms: lethal
3. extremely poisonous or injurious; producing venom
   • "venomous snakes"; "a virulent insect bite"
   • synonyms: venomous, virulent
4. involving loss of divine grace or spiritual death
   • "the seven deadly sins"
   • synonyms: mortal
5. exceedingly harmful
   • synonyms: baneful, pernicious, pestilent
6. (of a disease) having a rapid course and violent effect

DEADLY adverb

Definition of deadly (adverb)

1. as if dead
   • synonyms: lifelessly
2. (used as intensives) extremely
   • "she was madly in love"; "deadly dull"; "deadly earnest"; "deucedly clever"; "insanely jealous"
   • synonyms: deucedly, devilishly, insanely, madly