presumptive

(adjective)

adjective

1. having a reasonable basis for belief or acceptance

- the presumptive heir (or heir apparent)

Similar word(s): likely, probable

2. affording reasonable grounds for belief or acceptance

- presumptive evidence

- a strong presumptive case is made out

Similar word(s): believable, credible

Sentences with presumptive as an adjective:

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

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