[nod] 
verb, nod⋅ded, nod⋅ding, noun | 1. | to make a slight, quick downward bending forward of the head, as in assent, greeting, or command. |
| 2. | to let the head fall slightly forward with a sudden, involuntary movement when sleepy. |
| 3. | to doze, esp. in a sitting position: The speaker was so boring that half the audience was nodding. |
| 4. | to become careless, inattentive, or listless; make an error or mistake through lack of attention. |
| 5. | (of trees, flowers, plumes, etc.) to droop, bend, or incline with a swaying motion. |
| 6. | to bend (the head) in a short, quick downward movement, as of assent or greeting. |
| 7. | to express or signify by such a movement of the head: to nod approval; to nod agreement. |
| 8. | to summon, bring, or send by a nod of the head. |
| 9. | to cause (something) to lean or sway; incline. |
| 10. | a short, quick downward bending forward of the head, as in assent, greeting, or command or because of drowsiness. |
| 11. | a brief period of sleep; nap. |
| 12. | a bending or swaying movement. |
| 13. | nod off, to fall asleep or doze, esp. in a sitting position: He was reprimanded for nodding off in class. |
| 14. | nod out, Slang. to fall asleep, esp. owing to the effects of a drug. |
| 15. | give the nod to, Informal. to express approval of; agree to: The board gave the nod to the new proposal. |
| 16. | on the nod,
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nodded out
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