IPA: /əˈsjuːmd/
KK: /əˈsjumd/
Something that is accepted as true without proof or evidence; often used to describe a name or identity that is not genuine.
He introduced himself with an assumed name to protect his identity.
Assumed is formed from "assumere" (meaning to take up or receive) and the suffix "-ed" (indicating the past tense). The word "assumed" means to have taken up or accepted something as true without proof.
Think of 'taking up' something ('assumere') as true — that's why assumed means to accept something without proof.