• In general, a large, broad piece of anything thin, as paper, cloth, etc.; a broad, thin portion of any substance; an expanded superficies. • A broad piece of cloth, usually linen or cotton, used for wrapping the body or for a covering; especially, one used as an article of bedding next to the body. • A broad piece of paper, whether folded or unfolded, whether blank or written or printed upon; hence, a letter; a newspaper, etc. • A single signature of a book or a pamphlet; • the book itself. • A broad, thinly expanded portion of metal or other substance; as, a sheet of copper, of glass, or the like; a plate; a leaf. • A broad expanse of water, or the like. • A sail. • An extensive bed of an eruptive rock intruded between, or overlying, other strata. • A rope or chain which regulates the angle of adjustment of a sail in relation in relation to the wind; -- usually attached to the lower corner of a sail, or to a yard or a boom. • The space in the forward or the after part of a boat where there are no rowers; as, fore sheets; stern sheets. • To furnish with a sheet or sheets; to wrap in, or cover with, a sheet, or as with a sheet. • To expand, as a sheet.