n. The trachea or windpipe.n. One of a system of cylindrical, membranous, elastic, and muscular vessels or tubes, which convey the blood from the heart to all parts of the body by ramifications which as they proceed diminish in size and increase in number, and terminate in minute capillaries which unite the ends of the arteries with the beginnings of the veins.n. A main channel in any ramifying system of communication, as in drainage.To supply with arteries; figuratively, to traverse like arteries.