any of several sagelike, bushy composite plants of the genus Artemisia, esp. A. tridentata, having silvery, wedge-shaped leaves, with three teeth at the tip, common on the dry plains of the western U.S.
sage·brush (sāj'brŭsh') n. Any of several aromatic plants of the genus Artemisia, especially A. tridentata, a shrub of arid regions of western North America, having silver-green leaves and large clusters of small white flower heads.