Meaning of “presuppose” in the English Dictionary

british dictionary

"presuppose" in British English

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presupposeverb [ T ]

uk /ˌpriː.səˈpəʊz/ us /ˌpriː.səˈpoʊz/

to accept that something is true before it has been proved:

[ + that ] You're presupposing that he'll have told her - but he may not have.

formal If an idea or situation presupposes something, that thing must be true for the idea or situation to work:

Investigative journalism presupposes some level of investigation.
[ + that ] All this presupposes that he'll get the job he wants.

(Definition of “presuppose” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"presuppose" in American English

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presupposeverb [ T ]

us /ˌpri·səˈpoʊz/ fml

to think that something is true in advance without having any proof, or to consider that something is necessarily true if something else is true:

[ + that clause ] You’re presupposing that he told her – but he may not have.
Teaching presupposes a formal education.

(Definition of “presuppose” from the Cambridge Academic Content Dictionary © Cambridge University Press)