<p><strong>Noun</strong></p><ul><li>the act of presuming.</li><li>presuming.</li><li>assumption of something as true.</li><li>belief on reasonable grounds or probable evidence.</li><li>something that is presumed; an assumption.</li><li>a ground or reason for presuming or believing.</li><li>Law: an inference required or permitted by law as to the existence of one fact from proof of the existence of other facts.</li><li>an assumption, often not fully established, that is taken for granted in some piece of reasoning.</li><li>unwarrantable, unbecoming, or impertinent boldness.</li></ul><p><strong>Synonyms</strong></p><ul><li>gall, arrogance, effrontery, audacity.</li></ul>