1) v. To claim a requirement or entitlement. For example: to demand performance or payment under a contract. In lawsuits for performance or debt payment, plaintiffs should allege that they made a demand. 2) n. An unqualified request for payment or action. 3) During negotiations to settle a lawsuit, the amount requested by a plaintiff that is usually in writing. 4) adj. A promissory note that is payable whenever a request to pay it is made.