n. A covering for the head; specifically, a head-dress worn in the open air, having a crown, sides, and a brim.n. The layer of tan-bark spread over hides in a tan-pit.n. In a smelting-furnace, a depressed place in the tunnel-head designed to detain gases.n. In some soap-coppers and the like, a depressed chamber in the bottom, provided with a tap for drawing off the contents: designed to collect impurities that settle.n. In heraldry, a representation of the red hat, having the tassels on each side arranged as described under cordon.To provide with a hat: used chiefly in composition: as, straw-hatted girls.To place a hat upon the head of.To secure, as a seat, by placing one's hat upon it, as is done in the British House of Commons.A Middle English form of hot.n. An obsolete form of hate.n. See hot.n. In botany, the pileus or cap of a mushroom.