■ noun
1》 an act or instance of presuming something to be the case.
↘an idea that is presumed to be true.
↘ chiefly Law an attitude adopted towards something in the absence of contrary factors.
2》 presumptuous behaviour.
Origin
ME: from OFr. presumpcion , from L. praesumptio(n) 'anticipation', from praesumere (see presume ).