NOD

Definition of NOD

  1. (verb)express or signify by nodding
  2. (verb)lower and raise the head, as to indicate assent or agreement or confirmation
  3. (verb)let the head fall forward through drowsiness
  4. (verb)sway gently back and forth, as in a nodding motion
  5. (verb)be almost asleep
  6. (noun)a sign of assent or salutation or command
  7. (noun)the act of nodding the head