Meaning of “supposition” in the English Dictionary

british dictionary

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

"supposition" in American English

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suppositionnoun [ C ]

us /ˌsʌp·əˈzɪʃ·ən/ fml

an idea that something may be true, although it is not certain:

[ + that clause ] The investment was based on the supposition that there was adequate demand for a new modern office building.

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