n. In chem.: Same as distïlling-tube.n. A drying-apparatus of cylindrical shape: same as calcium-chlorid tube.n. In a railroad, a building in which are assembled the levers which control a system of switches and signals; a signalman's cabin. Signal-towers are usually two stories high, to give the signalman a view of the tracks and signals under his control. See switch-tower and signaling.n. In geology, a columnar protrusion of eruptive rock, such as the famous spine of Pelée on Martinique. See cumulovolcano.n. A building lofty in proportion to its lateral dimensions, of any form in plan, whether insulated or forming part of a church, castle, or other edifice.n. In early and medieval warfare, a tall, movable wooden structure used in storming a fortified place.n. A citadel; a fortress; a place of defense or protection.n. In astrology, a mansion.n. In heraldry, a bearing representing a fortified tower with battlements and usually a gate with a portcullis.n. A high commode or headdress worn by women in the reigns of William III. and Anne.n. A wig or the natural hair built up very high.To rise or extend far upward like a tower; rise high or aloft.To soar aloft, as a bird; specificallyto soar as a lark in the act of singingto rise straight up in the air, as a wounded bird (see towering, n.)to mount up, as a hawk to be able to swoop down on the quarry.To rise aloft into.n. An obsolete form of tour.