Also see definition of "foresail" in Bible Study Dictionaries
Word Study
foresail
CIDE DICTIONARY
foresail, n.
The sail bent to the foreyard of a square-rigged vessel, being the lowest sail on the foremast. [1913 Webster]
OXFORD DICTIONARY
foresail, n. Naut. the principal sail on a foremast (the lowest square sail, or the fore-and-aft bent on the mast, or the triangular before the mast).
Also see definition of "foresail" in Bible Study Dictionaries
For further exploring for "foresail" in Webster Dictionary Online