DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   Mailer
       n 1: United States writer (born in 1923) [syn: Mailer, Norman
    Mailer]
       2: a person who mails something
       3: an advertisement that is sent by mail
       4: a container for something to be mailed