n. A form of silica, somewhat allied to chalcedony, but more opaque, and with less luster.n. A piece of flinty stone used for any purpose, as for striking fire in a flint-lock musket or otherwise, or in the form of an implement. See cut under flint-lock.n. Figuratively, something very hard or obdurate: as, he was flint against persuasion.Made or composed of flint.Hard and firm, as if made of flint: as, flint corn or flint wheat.n. Sheepskin dried in the sun.n. An abbreviation of flint-glass.