Meanings
- simileEntirely, unquestionably or certainly dead.
I tried the flashlight, but the battery was as dead as a doorknob.
1 more example
I found the mouse who lived in our wall, lying on his back with his feet in the air—as dead as a doorknob.
Origin
Possibly from a misinterpretation or misunderstanding of the expression dead as a doornail. See usage notes below.
Full word history & related roots →Translations
Danish død som en sild
- død som en sildunquestionably dead (see here)
Finnish kuollut kuin kivi
- kuollut kuin kiviunquestionably dead (see here)
Norwegian Bokmål død som en sild
- død som en sildunquestionably dead (see here)
Cite this entry
dead as a doorknob. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/dead%20as%20a%20doorknob
“dead as a doorknob.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/dead%20as%20a%20doorknob. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “dead as a doorknob,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/dead%20as%20a%20doorknob.
Source: dead as a doorknob on Wiktionary, CC BY-SA 4.0.