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supposition

sup·po·si·tion

supposition

pronunciation:
suh p zI shn
part of speech: noun
definition 1: something that is supposed; assumption; hypothesis.
The police were operating under the supposition that the perpetrator was a man.
synonyms:
assumption, hypothesis, theory
similar words:
presumption, suspicion
definition 2: the act of supposing.
synonyms:
assumption, presumption
derivations: suppositional (adj.), suppositionally (adv.)