v. i. | 1. | To bend or incline the upper part, with a quick motion; as, nodding plumes. |
| 2. | 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. |
| 3. | To be careless or inattentive; to make a mistake from lack of attention. |
| 4. | To be drowsy or dull; to doze off, especially while in a sitting position; as, half the class nodded while the professor droned on. |
v. t. | 1. | 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. |
| 2. | To signify by a nod; as, to nod approbation. |
| 3. | To cause to bend. |
n. | 1. | A dropping or bending forward of the upper part or top of anything. |
| 2. | 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; as, a nod of approval. |