n.1. a. A chiefly Mediterranean perennial herb (Melissa officinalis) in the mint family, grown for its lemon-scented foliage, which is used as a seasoning or for tea. Also called lemon balm.
b. Any of several related plants in the mint family, such as the bee balm and the horse balm.
2. Any of various aromatic resins exuded from several trees and shrubs, especially the balm of Gilead (Commiphora) and related plants in the family Burseraceae.
3. An aromatic salve or oil.
4. A pleasing aromatic fragrance.
5. A soothing, healing, or comforting agent or quality.