Nod | Webster's Dictionary (1865)

Nōd, v. i.

verbintransitive

v. i. [Probably allied to Lat. nutare. Cf. W. nodi, to mark, to note, nōd, token, mark; Lat. notare, to mark, nota, mark; Dan. node, pl. noder, gestures, carriage of body.]

To bend or incline the upper part, with a quick motion; as, nodding plumes. “The nodding verdure of its brow.” Thomson.
To incline the head with a quick motion; to make a slight bow; to make a motion of assent, or of salutation, with the head; as, to nod at one.

Sit in a chair of state, and nod. Beau. & Fl. 3. To be drowsy. Your predecessors, contrary to other authors, never pleased their readers more than when they were nodding. Addison.

Nŏd, v. t.

verbtransitive

v. t. [imp. & p. p. NODDED; p. pr. & vb. n. NODDING.]

To incline or bend, as the head or top; to make a motion of assent, of salutation, or of drowsiness with.
To signify by a nod; as, to nod approbation.

Nŏd, n.

noun

n. 1. A dropping or bending forward of the upper part or top of any thing.

Like a drunken sailor on a mast, Ready with every nod to tumble down. Shak.

Sense 2. Hence, a quick downward or forward motion of the head, in assent, in familiar salutation, in drowsiness, as a signal, or in command.

A look or a nod only ought to correct them when they do amiss. Locke.

Sense 3. [Cf. Lat. numen, for nutamen.] An intimation of a wish, or any emotion; a command.