vi.

1. 点头
   She nodded to me in a friendly fashion.

   她友好地向我点了点头。

2. 打盹，打瞌睡
   The maid nodded with fatigue.

   女佣累得打瞌睡。

3. 不小心而出错
4. （树梢，花等）摆动，摇曳
   The lilies were nodding in the wind.

   百合花随风摇曳。

5. 吸食（注射）毒品之后睡着

vt.

1. 点（头）
2. 点头表示；向……点头表示[O1]
   He nodded his agreement.

   他点头表示同意。

n.

1. 点头[S1]
   He greeted us with a nod.

   他点头向我们打招呼。

2. 打盹，打瞌睡[C]
3. 摆动，摇曳[C]
4. （点头表示）同意[the S]

v.

1. lower and raise one's head slightly and briefly, especially in greeting, assent, or understanding, or as a signal.
   ▸signify or express in this way:

   he nodded his consent.
   ▸ (nod something through) informal approve something by general agreement and without discussion.
   ▸move one's head up and down repeatedly.
2. let one's head fall forward when drowsy or asleep.
   ▸ (nod off) informal fall asleep.
   ▸make a mistake due to a momentary lack of attention. [with allusion to L. dormitat Homerus ‘even Homer nods’ (Horace Ars Poet. 359).]
3. Soccer  head (the ball) in a specified direction without great force.

n.