presumptive

adjective5

1. •
   Based on presumption or conjecture; inferred, likely, presumed.

   • By late May, he was already considered his party’s presumptive nominee.
2. •
   Often postpositive, as in heir presumptive: of an heir or heiress: presumed to be entitled to inherit unless someone with a superior entitlement is born.

   • The Queen’s younger brother was the heir presumptive to the throne, until she gave birth to her first child.
3. •
   Of a cell or tissue: which has yet to differentiate, but is presumed to develop into a particular body part.
4. •
   Chiefly in presumptive evidence: providing a reasonable basis for a certain presumption or conclusion to be drawn.
5. •
   Synonym of presumptuous (“making unwarranted presumptions or assumptions, often out of arrogance or excessive self-confidence, and thus exceeding what is appropriate or right”).

   • Forgive me for being presumptive, but aren’t you and Mark engaged?