The phrase means 'Dead beyond doubt'. While the origin of the phrase is still disputed, doornails (circa 1350) are heavily-studded nails used to strengthen exterior passage doors. The expensive homes used them for ornamentation as well. To add strength and prevent theft, the nail was clinched on the inside, making it 'dead', or, unable to be re-used for the same purpose.
does more than mean add
What is mean deviation and why is quartile deviation better than mean deviation?
More than likely mean it might happen
Standard deviation can be greater than the mean.
more than
Deader than a doornail. Rowan died of cancer years back. Martin lived until he was 86.
dead as a doornail means it cant ever be used again
A doornail (coined c. 1350) is a very large studded nail on the outside of wooden doors, often used to nail on the metal strips which gave the door additional strength. They were also used as an ornamentational device. The more expensive homes had these metal, heavily-studded nails rather than wooden pegs, like the regular folks had. The doornails were 'clinched' on the inside of the door to prevent theft and give additional strength. Once clinched, the nail is 'dead', as in, it cannot be used again for that purpose.
Back And Deader Than Ever was released on May 1, 2012.
That grass is deader than a skeleton!
more poison
Dead as a Doornail was created on 2005-05-03.
So ease figure it out
deader
The Deader the Better - 2005 was released on: USA: 19 December 2005
The Walking Deader - 2014 was released on: USA: 9 February 2014
Yes, "dead as a doornail" is a metaphor. It compares the state of absolute death to the common object of a doornail to emphasize the finality and lifelessness.