Source : Webster's Revised Unabridged Dictionary (1913)

Desitive \Des"i*tive\, a.
   Final; serving to complete; conclusive. [Obs.] ``Desitive
   propositions.'' --I. Watts.

Desitive \Des"i*tive\, n. (Logic)
   A proposition relating to or expressing an end or conclusion.
   [Obs.] --I. Watts.