'Foresail' definitions:

Definition of 'foresail'

From: WordNet
noun
The lowest sail on the foremast of a square-rigged vessel

Definition of 'Foresail'

From: GCIDE
  • Foresail \Fore"sail`\, n. (Naut.) (a) The sail bent to the foreyard of a square-rigged vessel, being the lowest sail on the foremast. (b) The gaff sail set on the foremast of a schooner. (c) The fore staysail of a sloop, being the triangular sail next forward of the mast. [1913 Webster]