(historical) An oath asserting the right of the present royal family to the crown of England, and expressly abjuring allegiance to the descendants of Charles Edward Stuart, the Jacobite Pretender.

plural of Hippocratic oath

Resembling an oat or oats.

(agriculture) Silage made from oats: oat silage.

plural of oatmeal

The violation of an oath; perjury.

Resembling or characteristic of an oath.

(Internet slang, text messaging) Initialism of on a totally unrelated subject.

Without an oath or oaths.

Breach or breaking of an oath; perjury.