Question: what is the meaning of the idiom dead as a doornail?
Answer: Dead as a doornail is a phrase which means not alive, unequivocally deceased. The term goes back to the 1300s, the phrase dead as a doornail is found in poems of the time. The term dead as a doornail was used in the 1500s by William Shakespeare, and in Charles Dickens' A Christmas Carol in 1843.