<p><strong>Verb (used with object)</strong></p><ul><li>to arrive at or commit oneself to an opinion about (something) without having sufficient evidence to support the opinion fully: to guess a person's weight.</li><li>to estimate or conjecture about correctly: to guess what a word means.</li><li>to think, believe, or suppose: I guess I can get there in time.</li></ul><p><strong>Synonyms:</strong></p><ul><li>hazard</li><li>imagine</li><li>fancy</li></ul><p><strong>Antonyms:</strong></p><ul><li>know</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to form an estimate or conjecture (often followed by at or about): We guessed at the weight of the package.</li><li>to estimate or conjecture correctly.</li></ul><p><strong>Noun</strong></p><ul><li>an opinion that one reaches or to which one commits oneself on the basis of probability alone or in the absence of any evidence whatever.</li><li>the act of forming such an opinion: to take a guess at someone's weight.</li></ul>