presumptive

presumptive (comparative more presumptive, superlative most presumptive)

1. Based on presumption, probability, conjecture, hypothesis or belief.

   By late May, he was already considered his party's presumptive nominee.

2. Making presumptions; behaving as one who presumes, who assumes that which they perhaps should not.

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

• (based on presumption): likely, presumed
• (making presumptions): presumptuous

• heir presumptive