a. 1. Tending or assisting to constitute or compose; elemental; essential. [ 1913 Webster ]
An ingredient and constitutive part of every virtue. Barrow. [ 1913 Webster ]
2. Having power to enact, establish, or create; instituting; determining. Sir W. Hamilton. [ 1913 Webster ]
adv. In a constitutive manner. [ 1913 Webster ]