noun Any of numerous hemiparasitic evergreen plants of the order Santalales with white berries that grow in the crowns of apple trees, oaks, and other trees, such as the European mistletoe (Viscum album) and American mistletoe or eastern mistletoe (Phoradendron leucarpum).
noun A sprig of one such plant used as a Christmas decoration, associated with the custom that a man may kiss any woman standing beneath it.