presumption

1 shameless boldness shocked by his presumption in insisting that we buy his raffle tickets Synonyms audaciousness, audacity, brashness, brass, brassiness, brazenness, cheek, cheekiness, chutzpah (also chutzpa or hutzpah or hutzpa), crust, face, gall, nerve, nerviness, pertness, effrontery, presumptuousness, sauce, sauciness, temerityRelated Words arrogance, assurance, cockiness, confidence, hardihood, overconfidence, sanguinity, self-assurance, self-confidence; discourteousness, disrespect, impertinence, impoliteness, impudence, incivility, inconsiderateness, inconsideration, insolence, rudeness, ungraciousness; back talk, sass; swagger, swashNear Antonyms bashfulness, diffidence, faintheartedness, hesitancy, modesty, shyness, timidity, timidness, timorousness; civility, courteousness, courtesy, gentility, graciousness, mannerliness, manners

2 something taken as being true or factual and used as a starting point for a course of action or reasoning the presumption of innocence Synonyms given, hypothetical, if, postulate, premise (also premiss), assumption, presupposition, suppositionRelated Words hypothesis, proposition, theory, thesis; axiom, truism, verity; belief, canon, doctrine, dogma, gospel, law; precept, principle, rule, standard, tenet; basis, foundation, ground; conclusion, deduction, inference; affirmation, assertion, avouchment, declaration; dictum, ipse dixit