Definition of "foresail" in English

noun

1. (nautical, on a square-rigged ship) The lowest (and usually the largest) square sail hung on the foremast

2. (nautical) A square fore-and-aft sail set on the foremast, but behind it, on a schooner or other similar vessel.

3. (nautical, on a sloop) A triangular sail set forward of the foremast: forestaysail.