headsail

[ hed-seyl; Nautical hed-suh l ]
/ ˈhɛdˌseɪl; Nautical ˈhɛd səl /
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noun Nautical.

any of various jibs or staysails set forward of the foremost mast of a vessel.
any sail set on a foremast, especially on a vessel having three or more masts.

Origin of headsail

First recorded in 1620–30; head + sail
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for headsail

headsail

/ (ˈhɛdˌseɪl, nautical ˈhɛdsəl) /

noun

any sail set forward of the foremast
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012