What is the legal definition of an "oath"?

The legal definition of an "oath" is a formal affirmation. An oath is a solemn promise, often invoking a divine witness, regarding one's future action or the truth of a statement. In legal contexts, this is significant because oaths are commonly required during court proceedings when witnesses testify, ensuring that they are obligated to tell the truth. The act of taking an oath emphasizes the seriousness of the commitment to honesty under the law, and violating this can lead to legal consequences such as perjury charges.

While the other options touch on elements of commitments or agreements, they do not capture the specific nature of an oath as a formal affirmation that involves a sworn declaration of truthfulness or intention.