D defs.my
Entry 4 senses Webster, 1913

Oath

/(ōth)/ · IPA /ˈoʊθ/
01 n. A solemn affirmation or declaration, made with a reverent appeal to God for the truth of what is affirmed.
pl. Oaths ((ōt͟hz))
  1. 1.
    A solemn affirmation or declaration, made with a reverent appeal to God for the truth of what is affirmed.
    “An oath of secrecy for the concealing of those [inventions] which we think fit to keep secret.” Bacon.
  2. 2.
    A solemn affirmation, connected with a sacred object, or one regarded as sacred, as the temple, the altar, the blood of Abel, the Bible, the Koran, etc.
  3. 3.
    An appeal (in verification of a statement made) to a superior sanction, in such a form as exposes the party making the appeal to an indictment for perjury if the statement be false.(Law)
  4. 4.
    A careless and blasphemous use of the name of the divine Being, or anything divine or sacred, by way of appeal or as a profane exclamation or ejaculation; an expression of profane swearing.