MonelPronunciation: /ˈməʊn(ə)l/ (also Monel metal)Definition of Monel noun [mass noun] trademark a nickel-copper alloy with high tensile strength and resistance to corrosion. Origin: early 20th century: named after Ambrose Monell (died 1921), American businessmanMonel in other Oxford dictionaries Definition of Monel in the US English dictionary