Definitions of: herbalist ~ 1. One who grows, collects, or specializes in the use of herbs, especially medicinal herbs. 2. A therapist who heals by the use of herbs. 3. A person whose life is dedicated to the economic or medicinal uses of plants & skilled in the harvesting and collection of medicinal plants. 4. One versed in herbal lore and, in regard to therapy, an herb doctor.