Definify.com

Webster 1913 Edition

adv.

By presumption, or supposition grounded or probability; presumably.

adv.

By presumption, or supposition grounded on probability.

presumptively ‎(not comparable)

In a presumptive manner
As is presumed to be the case
- 2009, January 7, “Walter Dellinger”, in City of Cold Shoulders:
  […] his appointment is presumptively lawful.

as is presumed to be the case — see presumably