Read the dictionary definition of note. All definitions for this word.
1. a characteristic emotional quality
1. it ended on a sour note
2. there was a note of gaiety in her manner
3. he detected a note of sarcasm
2. a brief written record
1. he made a note of the appointment
3. a short personal letter
1. drop me a line when you get there
4. a comment or instruction (usually added)
1. his notes were appended at the end of the article
2. he added a short notation to the address on the envelope
5. a notation representing the pitch and duration of a musical sound
1. the singer held the note too long
6. a tone of voice that shows what the speaker is feeling
1. there was a note of uncertainty in his voice
7. a piece of paper money (especially one issued by a central bank)
1. he peeled off five one-thousand-zloty notes
8. a promise to pay a specified amount on demand or at a certain time
1. I had to co-sign his note at the bank
9. high status importance owing to marked superiority
1. a scholar of great eminence
10. make mention of
1. She observed that his presentation took up too much time
2. They noted that it was a fine day to go sailing
11. make a written note of
1. she noted everything the teacher said that morning
12. notice or perceive
1. She noted that someone was following her
2. mark my words
13. observe with care or pay close attention to
1. Take note of this chemical reaction