n. The act of writing on the back of a note, bill, or other written instrument.n. That which is written on the back of a note, bill, or other paper, as a name, an order for, or a receipt of, payment, or the return of an officer, etc.; a writing, usually upon the back, but sometimes on the face, of a negotiable instrument, by which the property therein is assigned and transferred.n. Sanction, support, or approval.