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mainsail

[meyn-seyl; Nautical meyn-suh l]
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noun Nautical.
  1. the lowermost sail on a mainmast.

Origin of mainsail

late Middle English word dating back to 1425–75; see origin at main1, sail
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for mainsail

Historical Examples

  • A mainsail carried by a gaff has two halyards, the throat and peak.

    Boys' Book of Model Boats

    Raymond Francis Yates

  • You will note that allowance must be made for hemming the back edge of the mainsail.

    Boys' Book of Model Boats

    Raymond Francis Yates

  • The other two sides of the mainsail are then laid off and pencil lines drawn.

    Boys' Book of Model Boats

    Raymond Francis Yates

  • I'll try and set the mainsail on her with the remains of the sprit.

    The Fortunes Of Glencore

    Charles James Lever

  • I've been dreamin' o' night-shirts ever since we bent our mainsail.

    "Captains Courageous"

    Rudyard Kipling


British Dictionary definitions for mainsail

mainsail

noun
  1. nautical the largest and lowermost sail on the mainmast
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