n.

1. 笔记；记录[C]
   He never took notes in class.

   他上课从不记笔记。

2. 注，注释[C]
3. 便条；（外交上的）照会[C]
   Tom opened the note from his cousin.

   汤姆打开了表兄写给他的便条。

4. 纸币；票据[C]
   He sent me four fifty-dollar notes.

   他寄给我四张五十圆面额的钞票。

5. 音符[C]
6. 口气，调子[S][（+of）]
   There was a note of warning in what he said.

   他的话带有一种警告的口气。

7. 名声；重要性[U]
8. 注意[U]
   His new theory is worthy of note.

   他提出的新理论值得注意。

vt.

1. 注意，注目；注意到[+（that）][+wh-]
   Please note that this bill must be paid within 10 days.

   请注意本帐单必须在十天内付款。

2. 提到，指明
   He noted the importance of the problem in his lecture.

   他在讲座中着重提到这一问题的重要性。

3. 记下[（+down）]
   The policeman noted down every word I said.

   警察记下了我所说的每一个字。

4. 对……加注释

n.

1. a brief written record of facts, topics, or thoughts, used as an aid to memory.
   ▸an annotation.
2. a short informal written message.
   ▸a short official document of certification.
   ▸an official letter sent from the representative of one government to another.
3. Brit. a banknote.
   ▸a written promise or notice of payment of various kinds.
4. a single tone of definite pitch made by a musical instrument or the human voice.
   ▸a written sign representing the pitch and duration of such a sound.
   ▸a key of a piano or similar instrument.
5. a bird's song or call, or a single tone in this.
6. a particular quality or tone expressing a mood or attitude:
   there was a note of scorn in her voice.
7. any of the basic components of a fragrance or flavour.

v.

1. pay attention to.
2. record in writing.