vowvaʊ(n.)

1. a solemn promise, pledge, or personal commitment:

   marriage vows; a vow of secrecy.

2. a solemn promise made to a deity or saint committing oneself to an act, service, or condition.

   Category: Religion

3. a solemn or earnest declaration.

4. (v.t.)to make a vow of; promise by a vow, as to a deity or a saint.

   Category: Religion

5. to pledge or resolve solemnly to do, make, give, etc.:

   They vowed revenge.

6. to declare solemnly or earnestly; assert emphatically.

7. to dedicate or devote by a vow.

   Category: Religion

8. (v.i.)to make a vow.

   Category: Religion

Idioms for vow:

1. take vows, to make an official commitment to a religious order.

   Category: Idiom, Religion

Origin of vow:

1250–1300; < OF vo(u) < L vōtum, neut. of vōtus, ptp. of vovēre to vow

vow′er(n.)