n a sign of assent or salutation or command
n the act of nodding the head
v express or signify by nodding
v lower and raise the head, as to indicate assent or agreement or confirmation
v let the head fall forward through drowsiness
v sway gently back and forth, as in a nodding motion
v be almost asleep
v. 点头( nod的第三人称单数 ); 打盹; 打瞌睡; 点头致意