mortally Meaning, Definition & Usage

  1. adverb in such a manner that death ensues (also in reference to hatred, jealousy, fear, etc.)
    • a being of whom the forest Indians are said to be mortally afraid, with a hoof shaped like the heel of a bottle

WordNet

Mor"tal*ly adverb
Definitions
  1. In a mortal manner; so as to cause death; as, mortally wounded.
  2. In the manner of a mortal or of mortal beings.
    I was mortally brought forth. Shak.
  3. In an extreme degree; to the point of dying or causing death; desperately; as, mortally jealous.
    Adrian mortally envied poets, painters, and artificers, in works wherein he had a vein to excel. Bacon.

Webster 1913