Definition of "perfective"

a perfective alteration

a. 1662 (date written), Thomas Fuller, The History of the Worthies of England, London: […] J[ohn] G[rismond,] W[illiam] L[eybourne] and W[illiam] G[odbid], published 1662

It is not likely that Eternal Life ſhall be a torpid and unactive ſtate, or that it ſhall conſiſt only in an uninterrupted and endleſs Act of Love; the other Faculties ſhall be employed as well as the Will, in Actions ſuitable to, and perfective of their Natures; […]

1701, John Ray, “Of Bodies Endued with a Sensitive Soul, or Animals”, in The Wisdom of God Manifested in the Works of the Creation, […], 3rd edition, London: […] Sam[uel] Smith, and Benj[amin] Walford, […], page 191