1. (noun)guess, conjecture, supposition, surmise, surmisal, speculation, hypothesis a message expressing an opinion based on incomplete evidence Synonyms: guess, possibility, conjecture, surmise, guesswork, theory, meditation, venture, supposition, dead reckoning, guessing, surmisal, supposal, assumption, hypothesis, speculation, shot
2. (noun)assumption, supposition, supposal a hypothesis that is taken for granted Synonyms: conjecture, supposal, surmisal, hypothesis, presumptuousness, guess, premiss, premise, effrontery, supposition, laying claim, speculation, presumption, surmise, assumption
3. (noun)supposition, supposal the cognitive process of supposing Synonyms: supposal, surmisal, hypothesis, conjecture, guess, surmise, supposition, speculation, assumption
Synonyms, Thesaurus & Antonyms of 'supposition'
English Synonyms and Antonyms
1. supposition An intellectual fancy is a mental image or picture founded upon slight or whimsical association or resemblance; a conceit has less of the picturesque and more of the theoretic than a fancy; a Synonyms: fancy, belief, desire, imagination, predilection, caprice, humor, inclination, supposition, conceit, idea, liking, vagary, conception, image, mood, whim Antonyms: actuality, certainty, fact, reality, truth, verity
Synonyms for supposition 
