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English definition of “assume”

assume

verb [T]
 
 
/əˈsjuːm/
B2 to think that something is likely to be true, although you have no proof: [+ (that)] Everything was quiet when I got home so I assumed that you had gone out.Guesses and assumptions
assume control/power/responsibility, etc to take a position of control/power/responsibility, etc: He has assumed the role of spokesman for the group.Taking part and getting involvedGetting involved for one's own benefit or against others' will
assume an air/expression, etc formal to pretend to have a feeling that you do not haveFaking and pretending
assume a false identity/name, etc to pretend to be someone else: an assumed nameFaking and pretending
(Definition of assume from the Cambridge Learners Dictionary © Cambridge University Press)
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