plural oaths ˈōt͟hz How to pronounce oath (audio)
: 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
The witness took an oath to tell the truth in court.
: something (such as a promise) corroborated by an oath
They were required to swear an oath of loyalty.
took the oath of office
: an irreverent or careless use of a sacred name
broadly : swear word
He uttered an oath and stormed away.

Examples of oath in a Sentence

an oath to defend the nation He uttered an oath and walked away.
Recent Examples on the Web But the parade of athletes, Olympic oath and torch lighting will all take place in Inglewood, a decision that was made years ago. Dakota Smith, Los Angeles Times, 29 June 2024 The Present Like doctors, some engineers take an oath to do no harm With U.S. infrastructure crumbling, an honor oath and iron ring remind engineers of their profession’s ethical weight. Big Think, 24 June 2024 These are two guys that have sworn an oath and their lives over to protect the royal family. Jennifer Maas, Variety, 24 June 2024 Stern Pinball The blood oath marker mounted on the left side is a nice touch that doesn’t interact with the ball. Aurich Lawson, Ars Technica, 7 May 2024 See all Example Sentences for oath 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'oath.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Middle English ooth, from Old English āth; akin to Old High German eid oath, Middle Irish oeth

First Known Use

before the 12th century, in the meaning defined at sense 1a(1)

Time Traveler
The first known use of oath was before the 12th century

Dictionary Entries Near oath

Cite this Entry

“Oath.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oath. Accessed 13 Jul. 2024.

Kids Definition


plural oaths ˈōt͟hz How to pronounce oath (audio)
: a solemn appeal to God or to some deeply respected person or thing to witness to the truth of one's word or the sincerity of a promise
under oath to tell the truth
: a careless or improper use of a sacred name
also : swearword

Medical Definition


Legal Definition


: a solemn attestation of the truth of one's words or the sincerity of one's intentions
specifically : one accompanied by calling upon a deity as a witness
: a promise (as to perform official duties faithfully) corroborated by an oath compare perjury

More from Merriam-Webster on oath

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