A name by which the sails hanging from the lower yards of a ship are usually distinguished, viz. the main-sail, fore-sail, and mizen: the staysails upon the lower masts are sometimes also comprehended in this denomination, as are the main staysails of all brigs and schooners. A ship is under her courses when she has no sail set but the fore-sail, main-sail, and mizen. Trysails are courses (which see), sometimes termed bentincks.