Definition of vow
- vow Noun A solemn promise to perform some act, or behave in a specified manner, especially a promise to live and act in accordance with the rules of a religious order.
- vow Noun A declaration or assertion.
- vow Verb To make a vow.
- vow Verb To declare publicly that one made a vow, usually to show one's determination or to announce an act of retaliation.