Source : Webster's Revised Unabridged Dictionary (1913)

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

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

Source : WordNet®

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: {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