Entry 2 senses · 2 variants Webster, 1913 Desitive · Des·i·tive · IPA a. n. 01 a. Final; serving to complete; conclusive. 1. Final; serving to complete; conclusive.[Obs.] 02 n. A proposition relating to or expressing an end or conclusion. 1. A proposition relating to or expressing an end or conclusion.(Logic) [Obs.]