D defs.my
Entry 1 sense Webster, 1913

mainsheet

· main·sheet · IPA /ˈmeɪnʃiːt/
01 n. One of the ropes by which the mainsail is hauled aft and trimmed.
  1. 1.
    One of the ropes by which the mainsail is hauled aft and trimmed.(Naut.)