presume Meaning in the Cambridge English Dictionary
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Meaning of “presume” in the English Dictionary

"presume" in British English

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presumeverb

uk   /prɪˈzjuːm/  us   /-ˈzuːm/

presume verb (BELIEVE)

C1 [T] to ​believe something to be ​true because it is very ​likely, ​although you are not ​certain: [+ (that)] I presume (that) they're not coming, since they haven't ​replied to the ​invitation. [+ speech] You are Dr Smith, I presume? "Are we ​walking to the ​hotel?" "I presume not/so." [+ obj + adj ] The boat's ​captain is ​missing, presumed dead (= it is ​believed that he is ​dead). In British ​law, you are presumed ​innocent until you are ​provedguilty. [+ obj + to infinitive ] The ​universe is presumed tocontain many other ​planets with some ​form of ​life.
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presume verb (BE RUDE)

[I] to do something ​although you ​know that you do not have a ​right to do it: [+ to infinitive] I wouldn't presume totell you how to do ​yourjob, but shouldn't this ​piece go there? I don't ​wish to presume (= make a ​suggestionalthough I have no ​right to), but don't you ​think you should ​apologize to her? He presumes on her good ​nature (= ​takesunfairadvantage of it).
(Definition of presume from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"presume" in American English

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presumeverb

 us   /prɪˈzum/

presume verb (BELIEVE)

[T] to ​believe something to be ​true because it is ​likely, ​although not ​certain: [+ (that) clause] I presume (that) they’re not coming, since they haven’t ​replied to the ​invitation. People ​accused of a ​crime are presumed ​innocent until ​provenguilty.

presume verb (BE RUDE)

[I] to be ​rude by doing something you ​know that you do not have a ​right to do: [+ to infinitive] How can you presume to ​criticize me when you did the same thing yourself?
presumably
adverb [not gradable]  us   /prɪˈzu·mə·bli/
Presumably they can ​afford to ​buy an ​apartment, or they wouldn’t be ​looking.
(Definition of presume from the Cambridge Academic Content Dictionary © Cambridge University Press)
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