sweet woodruff n 1: Old World fragrant stoloniferous perennial having small white flowers and narrow leaves used as flavoring and in sachets; widely cultivated as a ground cover; in some classifications placed in genus Asperula [syn: {waldmeister}, {woodruff}, {fragrant bedstraw}, {Galium odoratum}, {Asperula odorata}] 2: fragrant dark green leaves used to flavor May wine [syn: {waldmeister}]