oath

noun

plural oaths ˈōt͟hz How to pronounce oath (audio)
ˈōths
1
a(1)
: 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
(2)
: a solemn attestation of the truth or inviolability of one's words
The witness took an oath to tell the truth in court.
b
: something (such as a promise) corroborated by an oath
They were required to swear an oath of loyalty.
took the oath of office
2
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
During my son’s white coat ceremony, parents who were physicians were invited to stand and recite the oath alongside their children. Dana Suskind, Time, 27 Aug. 2025 My oath carries the weight of safeguarding every eligible citizen’s right to vote and to ensure that every vote is counted. Anthony Vega, Chicago Tribune, 20 Aug. 2025 Her oath was administered by Arkansas Supreme Court Associate Justice Cody Hiland. Nathan Ansell, Arkansas Online, 19 Aug. 2025 When the oath-taking ceremony comes around, Ellen watches as her brothers band together. Maggie Fremont, Vulture, 15 Aug. 2025 See All Example Sentences for oath

Word History

Etymology

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

Browse Nearby Words

Cite this Entry

“Oath.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oath. Accessed 6 Sep. 2025.

Kids Definition

oath

noun
plural oaths ˈōt͟hz How to pronounce oath (audio)
ˈōths
1
: 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
2
: a careless or improper use of a sacred name
also : swearword

Medical Definition

oath

Legal Definition

oath

noun
1
: 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
2
: a promise (as to perform official duties faithfully) corroborated by an oath compare perjury

More from Merriam-Webster on oath

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