n.

1. 小心，謹慎[U]
   Dad always drives with caution.

   爸爸開車一直十分小心。

2. 警告，告誡[C]
   The policeman let the driver off with a caution.

   警察向司機提出警告後就讓他走了。

3. 【口】令人發笑的人或物；發噱的事[S]

vt.

1. 警告，告誡，使小心[（+about/against/for）]
   We were cautioned not to make a lot of noise after ten in the evening.

   我們得到告誡晚上十點以後不要大聲喧鬧。

   The policeman cautioned me for parking here.

   警察警告我不可在此停車。

n.

1. care taken to avoid danger or mistakes.
2. Brit. an official or legal warning given to someone who has committed a minor offence but has not been charged.
3. informal, dated an amusing or surprising person.

v.

1. say something as a warning.
   ▸ (caution against) warn or advise against.
2. Brit. issue an official or legal warning to.
   ▸(of a police officer) advise (someone) of their legal rights when arresting them.