资料来源 : pyDict

根据推定的,假定的,给与推定之根据的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Presumptive \Pre*sump"tive\, a. [Cf. F. pr['e]somptif.]
   1. Based on presumption or probability; grounded on probable
      evidence; probable; as, presumptive proof.

   2. Presumptuous; arrogant. [R.] --Sir T. Browne.

   {Presumptive evidence} (Law), that which is derived from
      circumstances which necessarily or usually attend a fact,
      as distinct from direct evidence or positive proof;
      indirect or circumstantial evidence. ``Presumptive
      evidence of felony should be cautiously admitted.''
      --Blackstone. The distinction, however, between direct and
      presumptive (or circumstantial) evidence is now generally
      abandoned; all evidence being now more or less direct and
      more or less presumptive.

   {Presumptive heir}. See {Heir presumptive}, under {Heir}.

资料来源 : WordNet®

presumptive
     adj 1: having a reasonable basis for belief or acceptance; "the
            presumptive heir (or heir apparent)"
     2: affording reasonable grounds for belief or acceptance;
        "presumptive evidence"; "a strong presumptive case is made
        out"