be (as) dead as a doornail

be (as) dead as a doornail

1. To be no longer alive, for certain. (Doornails were hammered in a such a way that they could not be reused.) I poked that squirrel with a stick and, yeah, it's as dead as a doornail.
2. To be totally defunct. Oh, that idea from last week's meeting is dead as a doornail now that the CEO has vetoed it.
See also: dead, doornail
Farlex Dictionary of Idioms.
See also:
  • (as) dead as a doornail
  • as dead as a doornail
  • dead as a doornail
  • doornail
  • deader
  • deader than a doornail
  • dead as mutton
  • (as) dead as mutton
  • mutton
  • herring