promise

American  

[prom-is] / ˈprɒm ɪs /

noun

1. a declaration that something will or will not be done, given, etc., by one.

   unkept political promises.

2. an express assurance on which expectation is to be based.

   promises that an enemy will not win.

   Synonyms:

   pledge, word

3. something that has the effect of an express assurance; indication of what may be expected.

4. indication of future excellence or achievement.

   a writer who shows promise.

5. something that is promised.

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verb (used with object)

promised, promising

1. to engage or undertake by promise (usually used with an infinitive or a clause as object).

   She promised to go tomorrow.

   Synonyms:

   agree, covenant, pledge

2. to make a promise of (some specified act, gift, etc.).

   to promise help.

3. to make a promise of something to (a specified person).

   Promise me that you will come.

4. to afford ground for expecting.

   The sky promised a storm.

5. to engage to join in marriage.

6. to assure (used in emphatic declarations).

   I won't go there again, I promise you that!

verb (used without object)

promised, promising

1. to afford ground for expectation (often followed by well orfair ).

   His forthcoming novel promises well.

2. to make a promise.

promise British  

/ ˈprɒmɪs /

verb

1. to give an assurance of (something to someone); undertake (to do something) in the future

   I promise that I will come

2. (tr) to undertake to give (something to someone)

   he promised me a car for my birthday

3. (when tr, takes an infinitive) to cause one to expect that in the future one is likely (to be or do something)

   she promises to be a fine soprano

4. (usually passive) to engage to be married; betroth

   I'm promised to Bill

5. (tr) to assure (someone) of the authenticity or inevitability of something (often in the parenthetic phrase I promise you, used to emphasize a statement)

   there'll be trouble, I promise you

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noun

1. an undertaking or assurance given by one person to another agreeing or guaranteeing to do or give something, or not to do or give something, in the future

2. indication of forthcoming excellence or goodness

   a writer showing considerable promise

3. the thing of which an assurance is given

promise Idioms  

1. see lick and a promise.

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Other Word Forms

• outpromise verb (used with object)
• overpromise verb (used with object)
• prepromise noun
• promisable adjective
• promiseful adjective
• promiser noun
• quasi-promised adjective
• repromise verb
• unpromised adjective

Etymology

Origin of promise

First recorded in 1375–1425; (noun) late Middle English promis(se), from Medieval Latin prōmissa, from Latin prōmissum, noun use of neuter past participle of prōmittere “to promise,” literally, “to send forth,” equivalent to prō- pro- ¹ + mittere “to send”; (verb) late Middle English promisen, derivative of the noun

Explanation

A promise is an agreement to do or not do something. Also, when you have potential, you show promise. If your parents say you can go for ice cream and then it doesn't happen, you'll probably say, "But you promised!" People promise small things, like to visit someone, and big things, like marriage: “Til death do us part” is a promise many people make on their wedding day. Another meaning is to make a prediction, as in, "You'll regret this, I promise!” Also, if you show promise playing the violin, maybe someday you'll play in an orchestra.

Example Sentences

Since then, perovskites have also shown promise in LEDs, as well as X-ray detection and imaging technologies.

From Science Daily • Apr. 10, 2026

Pitchford asks whether either promise still has real force when the record is messy, the procedure rushed, and the law of review designed to look away.

From Slate • Apr. 10, 2026

Life and annuity insurers have snapped up some $1 trillion in private-credit investments that promise high returns for investors willing to be patient.

From The Wall Street Journal • Apr. 10, 2026

To this day, all orders are custom-made and nothing is frozen, a practice that stays true to the founding couple’s promise of “Quality, Cleanliness and Service.”

From Los Angeles Times • Apr. 9, 2026

“You’re making a big deal out of nothing again. I promise I’ll get to the next practice.”

From "Red Flags and Butterflies" by Sheryl Azzam

Related Words

• agreement
• assurance
• commitment
• guarantee
• obligation
• pact
• pledge
• vow
• word