'Deathly' definitions:

Definition of 'deathly'

(from WordNet)
adverb
To a degree resembling death; "he was deathly pale"
adjective
Having the physical appearance of death; "a deathly pallor" [syn: deathlike, deathly]
adjective
Causing or capable of causing death; "a fatal accident"; "a deadly enemy"; "mortal combat"; "a mortal illness" [syn: deadly, deathly, mortal]

Definition of 'Deathly'

From: GCIDE
  • Deathly \Death"ly\, a. Deadly; fatal; mortal; destructive. [1913 Webster]

Definition of 'Deathly'

From: GCIDE
  • Deathly \Death"ly\, adv. Deadly; as, deathly pale or sick. [1913 Webster]