\Con`sti*tu"tion*al*ly\, adv. 1. In accordance with the constitution or natural disposition of the mind or body; naturally; as, he was constitutionally timid. The English were constitutionally humane. --Hallam. 2. In accordance with the constitution or fundamental law; legally; as, he was not constitutionally appointed. Nothing would indue them to acknowledge that [such] an assembly . . . was constitutionally a Parliament. --Macaulay.