Origin: 1300–50;Middle English < Middle Frenchproposer (see pro-1, pose1), by association with derivatives of Latinprōpositus, past participle of prōpōnere to set forth. See propositus
mid-14c., from O.Fr. proposer (12c.), from pro- "forth" + poser "put, place" (see pose (v.1)). Meaning "make an offer of marriage" is first recorded 1764.