Definition of "Note" :

noun: a characteristic emotional quality

"It ended on a sour note."

noun: a brief written record

"He made a note of the appointment."

noun: a short personal letter

noun: a comment or instruction (usually added)

"His notes were appended at the end of the article."

noun: a notation representing the pitch and duration of a musical sound

"The singer held the note too long."

noun: a tone of voice that shows what the speaker is feeling

"There was a note of uncertainty in his voice."

noun: a piece of paper money (especially one issued by a central bank)

"He peeled off five one-thousand-zloty notes."

noun: a promise to pay a specified amount on demand or at a certain time

"I had to co-sign his note at the bank."

noun: high status importance owing to marked superiority

verb: make mention of

"They noted that it was a fine day to go sailing."

verb: make a written note of

"She noted everything the teacher said that morning."

verb: notice or perceive

"She noted that someone was following her."

verb: observe with care or pay close attention to

"Take note of this chemical reaction."