on oath
Definition of on oath
law
: having made a formal promise to tell the truth in a court of law
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oathplay
: a solemn usually formal calling upon God or a god to witness to the truth of what one says or to witness that one sincerely intends to do what one says
: a solemn attestation of the truth or inviolability of one's words
: something (such as a promise) corroborated by an oath
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