Definition of dead letters:
(N) :
the fifth album by Finnish band The Rasmus released in 2003.
(N) :
"'Dead Letters" is the third episode of the first season of the American crime-thriller television series Millennium.
(N) :
a 2007 independent feature film written and directed by Garrett Clancy, executive produced by Paul Hellweg,Welcome to Paul Hellweg.com produced by Josephina Sykes, and co-produced by Brad Sykes.