to bend or incline the upper part, with a quick motion; as, nodding plumes.-to incline the head with a quick motion; to make a slight bow; to make a motion of assent, of salutation, or of drowsiness, with the head; as, to nod at one.-to be drowsy or dull; to be careless.-to incline or bend, as the head or top; to make a motion of assent, of salutation, or of drowsiness with; as, to nod the head.-to signify by a nod; as, to nod approbation.-to cause to bend.-a dropping or bending forward of the upper oart or top of anything.-a quick or slight downward or forward motion of the head, in assent, in familiar salutation, in drowsiness, or in giving a signal, or a command.