Entry 1 sense Webster, 1913 Dorsally /dôr'-səl-ē/ · Dor·sal·ly · IPA /dˈɔrsəliː/ 01 adv. On, or toward, the dorsum, or back; on the dorsal side of; dorsad. 1. On, or toward, the dorsum, or back; on the dorsal side of; dorsad.(Anat.)