Also found in: Dictionary, Thesaurus, Medical, Legal.
Related to swear off: declare under oath
swear off (something)
to pledge to avoid or abstain from something. I've sworn off desserts. I am on a diet. No dessert for me. I've sworn off.
Pledge to renounce or give up, as in I've sworn off cigarettes. This expression was first used for abjuring liquor in the first half of the 1800s but has since been broadened to just about anything.
To pledge to renounce or give up something: I have sworn off cigarettes and alcohol.