[diǎn tóu]

nod at sb.
對某人點頭（打招呼）

She gave a nod of assent.
她點頭表示同意。

The lady nodded drily to me.
那位女士冷淡地朝我點頭。

A wink is as good as a nod to a blind horse.
對瞎馬點頭眨眼都是一樣。