oath

noun

plural oaths ˈōt͟hz How to pronounce oath (audio)
ˈōths
Synonyms of oath
1
a(1)
: a solemn usually formal calling upon God or a deity 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.
But the Justice Department dropped the charges in February, and Immigration and Customs Enforcement said two of its agents, who made false statements about the incident under oath, were placed on administrative leave. Zoe Sottile, CNN Money, 29 May 2026 That’s so antithetical to their humanity, that is such a clear violation of their obligation, their oath and the law? David Frum, The Atlantic, 27 May 2026 In 2023, federal prosecutors in New York City announced guilty pleas by immigration attorneys accused of preparing fraudulent asylum applications and affidavits and coaching clients to lie under oath. Nicole Sganga, CBS News, 26 May 2026 Joining the military includes an oath, a binding pledge to defend the Constitution against all enemies foreign and domestic and maintain allegiance to the country. Sun Sentinel Editorial Board, Sun Sentinel, 24 May 2026 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 3 Jun. 2026.

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

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