nod 1 W2 / nɒd $ nɑd / 动词 ( past tense and past participle nodded , present participle nodding ) [不及物和及物动词]

1 to move your head up and down, especially in order to show agreement or understanding → shake :

I asked her if she was ready to go, and she nodded.

Mom nodded her head sympathetically.

nod your approval/agreement etc (= show your approval etc by nodding )

Corbett nodded his acceptance.

2 to move your head down and up again once in order to greet someone or give someone a sign to do something

nod at

The judge nodded at the foreman to proceed.

nod to

She nodded to us as she walked by.

3 have a nodding acquaintance (with something) to know a little about a subject but not a lot :

Students will need to have a nodding acquaintance with Spanish.

4 have a nodding acquaintance (with somebody) ( also be on nodding terms (with somebody) British English ) to know someone but not very well

nod off 短语动词

to begin to sleep, usually when you do not intend to and are sitting somewhere :

I missed the movie because I kept nodding off.