1. nod off

1. He was nodding off by the fire.
    他在炉火边打盹。

1. 打盹,打瞌睡：go to sleep入睡,睡着 | nod off打盹,打瞌睡 | roll over (睡时)翻身,反侧;使打滚

2. 公共查询·英语单词

2. 打盹：nocuousness 有害 | nod off 打盹 | nod to its fall 摇摇欲坠

3. 犯困：Are you joking ? 你在开玩笑吗? | Nod off 犯困 | This music makes me nod off. 这音乐让我犯困.

4. 打瞌睡：get no reason to do 没理由去做,做...没意义 | nod off 打瞌睡 | way too much 太多了

1. (尤指不打算入睡时)打瞌睡，打盹
    If you nod off, you fall asleep, especially when you had not intended to.

911查询·英语单词

    e.g. The judge appeared to nod off yesterday while a witness was being cross-examined...
           昨天一名证人接受盘问时，法官好像在打盹。
    e.g. He was nodding off to sleep in an armchair.
           他坐在扶手椅上打盹，睡着了。

1. change from a waking to a sleeping state

    e.g. he always falls asleep during lectures

    Synonym: fall asleepdope offflake outdrift offdrop offdoze offdrowse off