1. A brief written record
2. A short personal letter; SYN. short letter, line.
3. A comment (usually added to a text); SYN. annotation, notation.
4. A notation representing the pitch and duration of a musical sound; SYN. musical note, tone.
5. A promise to pay a specified amount on demand or at a certain time; SYN. promissory note, note of hand.
6. A characteristic emotional quality
7. A tone of voice that shows what the speaker is feeling

ETYM as. hnîtan to strike against, imp. hnât.
1. To make a written note of; SYN. take down.
2. To make mention of; SYN. observe, mention, remark.
3. To observe with care or pay close attention to; SYN. take note, observe.
In music, the written symbol indicating pitch and duration, the sound of which is a tone.