meliorator, melioraterrare.|ˈmiːlɪəreɪtə(r)| [agent-n. f. meliorate v.: see -or, -er1.] One who or something which meliorates. 1855in Ogilvie Suppl.1870Emerson Soc. & Solit., Work & DaysWks. (Bohn) III. 68 The greatest meliorator of the world is selfish, huckstering Trade.