Verb
1. express or signify by nodding;
"He nodded his approval"2. lower and raise the head, as to indicate assent or agreement or confirmation;
"The teacher nodded when the student gave the right answer"3. let the head fall forward through drowsiness;
"The old man was nodding in his chair"4. sway gently back and forth, as is in a nodding motion;
"the flowers were nodding in the breeze"5. be almost asleep;
"The old man sat nodding by the fireplace"