vow vow /ˈvaʊ/

noun

1. A solemn pledge (to oneself or to another or to a deity) to do something or to behave in a certain manner  ( vow )
   a solemn pledge (to oneself or to another or to a deity) to do something or to behave in a certain manner
    They took vows of poverty
   they took vows of poverty
   

verb

1. () Make a vow; promise  ( vow )
   make a vow; promise
    He vowed never to drink alcohol again
   He vowed never to drink alcohol again
   
2. Dedicate to a deity by a vow  ( consecrate , vow )
   dedicate to a deity by a vow