What is the meaning of Vow?

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.

A declaration or assertion.

A votive offering.

To make a vow; to promise.

To make a vow regarding (something).

To declare publicly that one has made a vow, usually to show one's determination or to announce an act of retaliation.

exclamation of astonishment, pleasure, or admiration

Source: wiktionary.org