The Collaborative International Dictionary of English v.0.48:

Masthead \Mast"head`\, n. (Naut.)
   The top or head of a mast; the part of a mast above the
   hounds.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Masthead \Mast"head"\, v. t. (Naut.)
   To cause to go to the masthead as a punishment. --Marryat.
   [1913 Webster]

WordNet (r) 3.0 (2006):

masthead
    n 1: a listing printed in all issues of a newspaper or magazine
         (usually on the editorial page) that gives the name of the
         publication and the names of the editorial staff, etc.
         [syn: masthead, flag]
    2: the title of a newspaper or magazine; usually printed on the
       front page and on the editorial page
    3: the head or top of a mast