'Headsail' definitions:

Definition of 'headsail'

(from WordNet)
noun
Any sail set forward of the foremast of a vessel

Definition of 'Headsail'

From: GCIDE
  • Headsail \Head"sail`\ (-s[=a]l`), n. (Naut.) Any sail set forward of the foremast. --Totten. [1913 Webster]