| Noun | 1. | mugwort - any of several weedy composite plants of the genus Artemisiagenus Artemisia - usually aromatic shrubs or herbs of north temperate regions and South Africa and western South America: wormwood; sagebrush; mugwort; tarragon wormwood - any of several low composite herbs of the genera Artemisia or Seriphidium Artemisia vulgaris, common mugwort - European tufted aromatic perennial herb having hairy red or purple stems and dark green leaves downy white below and red-brown florets | |