Promisor Definition: The person who has become obliged through a promise (usually expressed in a contract) towards another. Related Terms: Promisee, Obligor The oppposite of a promisee; the promisor is the one making the promise: the person who makes a promise or a contractual commitment. Stewart Rapalje's dictionary: "Promissor: one who makes a promise." The promisor is often referred to as the obligor. Who has become so obliged towards another, the promisee, the beneficiary of the promise. REFERENCES: Rapalje, Stewart and Lawrence, Robert, A Dictionary of American and English Law, Volume II (Jersey City: Frederick D. Linn & Co. Law Publishers and Booksellers, 1883), page 1023. Categories & Topics: Contract Law Dictionary Find you are constantly looking up definitions? Try our search provider (works in most modern browsers) If you find an error or omission in Duhaime's Legal Dictionary, or if you have legal term suggestion, we'd love to hear from you!