(US, informal) A one-hundred dollar banknote. / (music) The lowest note of an instrument, written below the staff and the D note.

(finance) A document saying that someone owes a specific amount of money to someone else, often with the deadline and interest fees; the primary purposes of a promissory note are to evidence the debt obligation incurred, and to establish terms for payment thereof.

(Canada, US, music) A note having one-eighth the duration of a whole note; a quaver

A commercial document issued by a seller to a buyer to cancel part or all of an earlier invoice.

An unsigned diplomatic note written in the third person, of the nature of a memorandum but sometimes considered to be more formal.

Alternative spelling of c-note

A five-dollar bill.

(now archaic) A written guarantee to pay or repay a given sum; a receipt; a promissory note.

Alternative form of notebook

(finance) A note issued by a bank, payable at some future specified time, as distinguished from a note payable on demand.