nod

名词 nod:

1. a sign of assent or salutation or command
2. the act of nodding the head

动词 nod:

1. express or signify by nodding
2. lower and raise the head, as to indicate assent or agreement or confirmation
3. let the head fall forward through drowsiness
4. sway gently back and forth, as is in a nodding motion
5. be almost asleep

1. The old lady sat nodding by the fire.
   那老太太坐在火炉旁打瞌睡。
2. She nodded when she passed me in the street.
   她在街上走过我身旁时向我点了点头。
3. He nodded in agreement with me.
   他点头表示同意我的意见。
4. She greeted us with a nod of the head.
   她向我们点点头打招呼。

nod

v.（动词）
nod.ded,nod.ding,nods
v.intr.（不及物动词）
To lower and raise the head quickly, as in agreement or acknowledgment.
点头：快速地低下并抬起头，如表示同意或致意
To let the head fall forward when sleepy; doze momentarily:
打盹：当困倦时头向前垂着；短时的小睡：
例句：
nodded off on the train.
在火车上打瞌睡

To be careless or momentarily inattentive as if sleepy; lapse:
过失：不小心或好象困了一时疏忽；失误：
例句：
Even Homer nods.
即使荷马也疏忽

To sway, move up and down, or droop, as flowers in the wind.
上下摆动：弯曲上下来回移动或垂下，如在风中的花朵
v.tr.（及物动词）
To lower and raise (the head) quickly in agreement or acknowledgment.
点（头等）：快速地低下并抬起（头）以示同意或致意
To express by lowering and raising the head:
点头表示：通过点头表示：
例句：
He nodded his agreement.
他点头表示同意

To summon, guide, or send by nodding the head:
点头示意：通过点头来召唤，指引或使去：
例句：
The chairperson nodded us into the room.
那位主席点头示意将我们引进屋子

n.（名词）
A forward or up-and-down movement of the head, usually expressive of drowsiness or agreement:
点头：头的向前或上下移动的动作，通常为困倦或同意的表达：
例句：
gave a nod of affirmation.
点头确认

An indication of approval or assent:
同意：表示同意或赞成的信号：
例句：
The contestant got the nod from the judges.
选手从裁判那获得了同意的信号

来源：
Middle English nodden ; akin to perhaps akin to Middle High German notten
中古英语 nodden ；类似于 可能类似于 中古高地德语 notten

【引伸】
nod.der
n.（名词）