Definitions for mainsailˈmeɪnˌseɪl; Naut. -səl
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Random House Webster's College Dictionary
main•sailˈmeɪnˌseɪl; Naut. -səl(n.)
the lowermost sail on a mainmast.
Category: Nautical
Origin of mainsail:
1425–75
Princeton's WordNet
mainsail(noun)
the lowermost sail on the mainmast
Wiktionary
mainsail(Noun)
The largest (or only) sail on a sailing vessel.
Webster Dictionary
Mainsail(noun)
the principal sail in a ship or other vessel
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