'Deathblow' definitions:

Definition of 'deathblow'

From: WordNet
noun
The blow that kills (usually mercifully) [syn: deathblow, coup de grace]

Definition of 'Deathblow'

From: GCIDE
  • Deathblow \Death"blow`\, n. A mortal or crushing blow; a stroke or event which kills or destroys. [1913 Webster]
  • The deathblow of my hope. --Byron. [1913 Webster]

Synonyms of 'deathblow'

From: Moby Thesaurus