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English definition of “presuppose”

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presuppose

verb [T] uk   /ˌpriː.səˈpəʊz/ us    /-ˈpoʊz/
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 Learners Dictionary & Thesaurus © Cambridge University Press)
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