1a(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 namebroadly: swear word //He uttered an oath and stormed away.
: a formal and serious promise to tell the truth or to do something
old-fashioned : an offensive or rude word that is used to express anger, frustration, surprise, etc.
oath
noun
\ ˈōth\
plural oaths\ˈōt͟hz , ˈōths \
Kids Definition of oath
1: a solemn promise to tell the truth or do a specific thing
2: an obscene or impolite word used to express anger or frustration
oath
Medical Definition of oath
— see hippocratic oath
oath
noun
Legal Definition of oath
1: a solemn attestation of the truth of one's words or the sincerity of one's intentionsspecifically: 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
under oath
: under a solemn and especially legal obligation to tell the truth (as when testifying)