Definition of mainsail in English:

mainsail

Line breaks: main|sail
Pronunciation: /ˈmeɪnseɪl
 
, -s(ə)l/

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 part of the mainmast in a fore-and-aft rigged vessel.

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Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody