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English definition of “assume”

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assume

verb [T]  /əˈsum/ us  

assume verb [T] (ACCEPT)

to accept something as true without question or proof: [+ (that) clause] We can’t assume (that) he’s innocent simply because he says he is. [+ (that) clause] I assumed (that) nobody was home because the car wasn’t in the driveway.

assume verb [T] (PRETEND)

to pretend to be someone you are not, or to express a feeling falsely: During the investigation, two detectives assumed the identities of antique dealers. Jim assumed a look of indifference.

assume verb [T] (TAKE CONTROL)

to take control or claim authority, sometimes without the right to do so: The new president assumes office in January. If you assume responsibility for something, you become responsible for it.
(Definition of assume from the Cambridge Academic Content Dictionary © Cambridge University Press)
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