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Webster 1913 Edition

(mān′sālˊ)

Noun.

(Naut.)

The principal sail in a ship or other vessel.

[They] hoised up the

mainsail

to the wind.

Acts xxvii. 40.

☞ The mainsail of a ship is extended upon a yard attached to the mainmast, and that of a sloop or schooner upon the boom.

The red sail is the mainsail.

mainsail ‎(plural mainsails)

largest sail on a sailing vessel