assumption
as-sump-tion
noun
The act of taking control, power, or responsibility.
"His assumption of leadership was swift."
noun
A belief accepted as true without proof or evidence.
"Don't make assumptions; check the facts."
noun
The Christian belief in Mary's bodily ascent into heaven.
"The Assumption is a significant Catholic doctrine."
Thesaurus
Synonyms: supposal, supposition, Assumption of Mary, August 15, laying claim, premise, premiss, effrontery, presumption, presumptuousness