mainsheet

The rope that controls the angle at which a mainsail is trimmed and set.

The sheet or rope used for securing the mainsail when set. See sheet.

plural Collectively, all the sheets of the square sails on the mainmast, but especially the sheets which belong to the main course.

In Jamaica, weak rum and water.

One of the ropes by which the mainsail is hauled aft and trimmed.

The rope connected to and controlling the mainsail.

(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind