assumption

1 something taken as being true or factual and used as a starting point for a course of action or reasoning the widespread assumption that violent entertainment leads to violent behavior in children your argument is faulty because it's based on erroneous assumptions Synonyms given, hypothetical, if, postulate, premise (also premiss), presumption, presupposition, supposition Related 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

2 an exaggerated sense of one's importance that shows itself in the making of excessive or unjustified claims his air of assumption tended to put people off rather quickly Synonyms arrogance, bumptiousness, consequence, haughtiness, hauteur, high horse, huffiness, imperiousness, loftiness, lordliness, masterfulness, peremptoriness, pomposity, pompousness, presumptuousness, pretense (or pretence), pretension, pretentiousness, self-consequence, self-importance, superciliousness, superiority, toploftinessRelated Words authoritativeness, bossiness, bowwow, brag, dominance, high-handedness; condescension, disdain, scorn; chest-thumping, inflation, self-assertion, side [chiefly British], snobbery, snobbishness, snobbism, snootiness; attitude, cheek, cheekiness, impertinence, impudence, sauciness; boastfulness, bombast, braggadocio, bravado, strut, swagger, triumphalism, vaingloriousness, vainglory; cockiness, complacence, conceit, egoism, egotism, pride, pridefulness, self-assumption, self-centeredness, self-complacency, self-conceit, self-content, self-contentment, self-opinion, self-partiality, self-satisfaction, smugness, swelled head, vanity; superiority complexNear Antonyms bashfulness, demureness, retiringness, shyness; diffidence, self-distrust, self-doubt, timidity, timidness; lowliness, meekness, mousiness, passiveness, passivity, submissiveness; quietness, reserve, reservednessAntonyms humility, modesty, unassumingness, unpretentiousness