Definition of mainsail in English:

mainsail

Syllabification: main·sail
Pronunciation: /ˈmānsəl, -ˌsāl
 
 
/

noun

1The principal sail of a ship, especially the lowest sail on the mainmast in a square-rigged vessel.
More example sentences
  • Hornblower watched as both ships backed the mainsails, turned the helm hard over, and took up the prescribed position.
  • As the galley righted itself, another wave struck from the other side, and the ship heeled over so far its mainsail almost touched the water.
  • While the mainsail provides a large portion of power, it also affects the boat's directional control.
1.1The sail set on the after side of the mainmast in a fore-and-aft-rigged vessel.

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