vow

American  

[vou] / vaʊ /

noun

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.

3. a solemn or earnest declaration.

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verb (used with object)

1. to make a vow of; promise by a vow, as to God or a saint.

   to vow a crusade or a pilgrimage.

2. to pledge or resolve solemnly to do, make, give, observe, etc..

   They vowed revenge.

3. to declare solemnly or earnestly; assert emphatically (often followed by a clause as object).

   She vowed that she would take the matter to court.

4. to dedicate or devote by a vow.

   to vow oneself to the service of God.

verb (used without object)

1. to make a vow.

2. to make a solemn or earnest declaration.

idioms

1. take vows, to enter a religious order or house.

vow British  

/ vaʊ /

noun

1. a solemn or earnest pledge or promise binding the person making it to perform a specified act or behave in a certain way

2. a solemn promise made to a deity or saint, by which the promiser pledges himself to some future act, course of action, or way of life

3. to enter a religious order and commit oneself to its rule of life by the vows of poverty, chastity, and obedience, which may be taken for a limited period as simple vows or as a perpetual and still more solemn commitment as solemn vows

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verb

1. (tr; may take a clause as object or an infinitive) to pledge, promise, or undertake solemnly

   he vowed that he would continue

   he vowed to return

2. (tr) to dedicate or consecrate to God, a deity, or a saint

3. (tr; usually takes a clause as object) to assert or swear emphatically

4. archaic (intr) to declare solemnly

Other Word Forms

• unvowed adjective
• vower noun
• vowless adjective

Etymology

Origin of vow

1250–1300; Middle English < Anglo-French, Old French vo ( u ) < Latin vōtum, neuter of vōtus, past participle of vovēre to vow

Example Sentences

They conclude that it signals toughness—and vow to outdo him.

From The Wall Street Journal • Mar. 23, 2026

Governments love anything they can tax, and simultaneously vow never to get left behind on a new technology wave by China ever again.

From Barron's • Mar. 19, 2026

Fox opened an investigation and concluded that Martin had run afoul of a rule of professional conduct that forbids attorneys from violating their oath of office, which includes a vow to support the U.S.

From Slate • Mar. 11, 2026

It’s a staggering portrait of a woman who can’t escape her detractors or the personal trauma that triggered her vow of celibacy.

From Los Angeles Times • Mar. 10, 2026

Despite my earlier vow not to hike with the car, I found it rather suited me here—indeed, completely suited me.

From "A Walk in the Woods" by Bill Bryson

Related Words

• affirm
• assure
• declare
• promise
• swear