note in WordNet English dictionary

1. a comment or instruction (usually added)
   "his notes were appended at the end of the article"; "he added a short notation to the address on the envelope"
   note  annotation  notation 
   
2. a piece of paper money (especially one issued by a central bank)
   "he peeled off five one-thousand-zloty notes"
   bill  note  government note  bank bill  banker's bill  bank note  banknote  Federal Reserve note  greenback 
   
3. a short personal letter
   "drop me a line when you get there"
   note  short letter  line  billet 
   
4. high status importance owing to marked superiority
   "a scholar of great eminence"
   eminence  distinction  preeminence  note 
   
5. a notation representing the pitch and duration of a musical sound
   "the singer held the note too long"
   note  musical note  tone 
   
6. a characteristic emotional quality
   "it ended on a sour note"; "there was a note of gaiety in her manner"; "he detected a note of sarcasm"
   note 
   
7. a brief written record
   "he made a note of the appointment"
   note 
   
8. a tone of voice that shows what the speaker is feeling
   "there was a note of uncertainty in his voice"
   note 
   
9. a promise to pay a specified amount on demand or at a certain time
   "I had to co-sign his note at the bank"
   note  promissory note  note of hand 
   

1. notice or perceive
   "She noted that someone was following her"; "mark my words"
   notice  mark  note 
   
2. make mention of
   "She observed that his presentation took up too much time"; "They noted that it was a fine day to go sailing"
   note  observe  mention  remark 
   
3. make a written note of
   "she noted everything the teacher said that morning"
   note  take down 
   
4. observe with care or pay close attention to
   "Take note of this chemical reaction"
   note  take note  observe