ferrousPronunciation: /ˈfɛrəs/Translate ferrous | into German | into Italian Definition of ferrous adjective 1(chiefly of metals) containing or consisting of iron. 2 Chemistry of iron with a valency of two; of iron(II). Compare with ferric.Origin: mid 19th century: from Latin ferrum 'iron' + -ousferrous in other Oxford dictionaries Definition of ferrous in the US English dictionary