note

Dictionary definition · note

a brief written record"he made a note of the appointment"
a short personal letter"drop me a line when you get there"
a notation representing the pitch and duration of a musical sound"the singer held the note too long"
a tone of voice that shows what the speaker is feeling"there was a note of uncertainty in his voice"
a characteristic emotional quality"it ended on a sour note"
a piece of paper money (especially one issued by a central bank)"he peeled off five one-thousand-zloty notes"
a comment or instruction (usually added)"his notes were appended at the end of the article"
high status importance owing to marked superiority"a scholar of great eminence"

make mention of"She observed that his presentation took up too much time"
notice or perceive"She noted that someone was following her"
observe with care or pay close attention to"Take note of this chemical reaction"
make a written note of"she noted everything the teacher said that morning"

Source: Open English WordNet (CC BY 4.0).