Source : Webster's Revised Unabridged Dictionary (1913)

Headline \Head"line`\, n.
   1. (Print.) The line at the head or top of a page.

   2. (Naut.) See {Headrope}.

Source : WordNet®

headline
     n : the heading or caption of a newspaper article [syn: {newspaper
         headline}]

headline
     v 1: publicize widely or highly, as if with a headline
     2: provide (a newspaper page or a story) with a headline