'Presumptive' definitions:

Definition of 'presumptive'

(from WordNet)
adjective
Having a reasonable basis for belief or acceptance; "the presumptive heir (or heir apparent)"
adjective
Affording reasonable grounds for belief or acceptance; "presumptive evidence"; "a strong presumptive case is made out"

Definition of 'Presumptive'

From: GCIDE
  • Presumptive \Pre*sump"tive\, a. [Cf. F. pr['e]somptif.]
  • 1. Based on presumption or probability; grounded on probable evidence; probable; as, presumptive proof. [1913 Webster]
  • 2. Presumptuous; arrogant. [R.] --Sir T. Browne. [1913 Webster]
  • 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. [1913 Webster]