Main Entry:

pre·sump·tion

Pronunciation:

\pri-ˈzəm(p)-shən\

Function:

noun

Etymology:

Middle English presumpcioun, from Anglo-French presumption, from Late Latin & Latin; Late Latin praesumption-, praesumptio presumptuous attitude, from Latin, assumption, from praesumere

Date:

13th century

1: presumptuous attitude or conduct : audacity2 a: an attitude or belief dictated by probability : assumption b: the ground, reason, or evidence lending probability to a belief3: a legal inference as to the existence or truth of a fact not certainly known that is drawn from the known or proved existence of some other fact