lower and raise one's head slightly and briefly, especially in greeting, assent, or understanding, or to give someone a signal

he looked around for support and everyone nodded

she nodded her head in agreement

let one's head fall forward when drowsy or asleep

Anna nodded over her book

head (the ball) without great force

Henry nodded the ball over the line

an act of nodding the head

at a nod from his father he left the room