To formally renounce or reject a belief, cause, or claim. He decided to abjure his allegiance to the organization after discovering its unethical practices.
To renounce or recant solemnly, especially under oath. In court, she abjured the testimony she had given the previous day.
To deliberately abstain from or avoid something as a matter of principle or decision. Following his heart attack, he abjured all forms of fatty food.