<p><strong>Verb (used without object)</strong></p><ul><li>swore or (Archaic) sware; sworn; swear·ing: to make a solemn declaration or affirmation by some sacred being or object, as a deity or the Bible.</li><li>Synonyms: avow, declare, affirm.</li><li>to bind oneself by oath.</li><li>to give evidence or make a statement on oath.</li><li>Synonyms: testify, depose.</li><li>to use profane oaths or language: Don't swear in front of the children.</li><li>Synonyms: imprecate.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>swore or (Archaic) sware; sworn; swear·ing: to declare, affirm, attest, etc., by swearing by a deity, some sacred object, etc.</li><li>to affirm, assert, or say with solemn earnestness.</li><li>to promise or undertake on oath or in a solemn manner; vow.</li><li>to testify or state on oath: He swore it on the witness stand.</li><li>to take (an oath), as in order to give solemnity or force to a declaration, promise, etc.</li><li>to bind by an oath: to swear someone to secrecy.</li></ul><p><strong>Noun</strong></p><ul><li>Informal: a profane or obscene word; curse word: If we said a swear, Mom made us put a quarter in the jar. Heads-up—this movie trailer is full of swears and is NSFW.</li></ul><p><strong>Verb Phrase</strong></p><ul><li>to name (a sacred being or thing) as one's witness or guarantee in swearing.</li><li>Informal: to have great confidence in; rely on: He swears by his dentist.</li><li>to have certain knowledge of: I thought I saw him leaving, but I couldn't swear by it.</li><li>to promise or resolve to give up something: I've decided to swear off the internet one day a week. Have you sworn off red meat?</li><li>to admit to office or service by administering an oath: A new president will be sworn in today.</li><li>to secure (a warrant for arrest) by making an accusation under oath.</li></ul>