mugwort Syllabification: (mug·wort)Pronunciation: /ˈməgwərt, -ˌwôrt/Definition of mugwort noun a plant of the daisy family, with aromatic divided leaves that are dark green above and whitish below, native to north temperate regions. Genus Artemisia, family Compositae: several species, in particular the common A. vulgaris, which has long been connected with magic and superstition Origin: Old English mucgwyrt (see midge, wort)mugwort in other Oxford dictionaries Definition of mugwort in the British & World English dictionary