mallowPronunciation: /ˈmaləʊ/Definition of mallow noun a herbaceous plant with hairy stems, pink or purple flowers, and disc-shaped fruit. Genus Malva, family Malvaceae (the mallow family, which also contains hollyhocks, hibiscus, and abutilon): many species. Origin: Old English meal(u)we, from Latin malva; related to Greek malakhē; compare with mauvemallow in other Oxford dictionaries Definition of mallow in the US English dictionary