(1):
(n.) A thickness of paper, pasteboard, or the like, placed under a cut, or stereotype plate, or under type, in the from, to bring it, or any part of it, to the proper height; also, something placed back of a part of the tympan, so as to secure the right impression.
(2):
(v. t.) To raise or support by something laid under; as, to underlay a cut, plate, or the like, for printing. See Underlay, n., 2.
(3):
(v. t.) To lay beneath; to put under.
(4):
(n.) The inclination of a vein, fault, or lode from the vertical; a hade; - called also underlie.
(5):
(n.) To put a tap on (a shoe).
(6):
(v. i.) To incline from the vertical; to hade; - said of a vein, fault, or lode.