Nod

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Nod

(v. i.) To bend or incline the upper part, with a quick motion; as, nodding plumes.
(v. i.) 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.
(v. i.) To be drowsy or dull; to be careless.
(v. t.) 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.
(v. t.) To signify by a nod; as, to nod approbation.
(v. t.) To cause to bend.
(n.) A dropping or bending forward of the upper oart or top of anything.
(n.) 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.