smart

American  

[smahrt] / smɑrt /

verb (used without object)

1. to be a source of sharp, local, and usually superficial pain, as a wound.

   Synonyms:

   sting, hurt, pain

2. to be the cause of a sharp, stinging pain, as an irritating application, a blow, etc.

3. to feel a sharp, stinging pain, as in a wound.

4. to suffer keenly from wounded feelings.

   She smarted under their criticism.

5. to feel shame or remorse or to suffer in punishment or in return for something.

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verb (used with object)

1. to cause a sharp pain to or in.

adjective

smarter, smartest

1. quick or prompt in action, as persons.

   Synonyms:

   active, alert, agile, nimble, lively

2. having or showing quick intelligence or ready mental capability.

   a smart student.

   Synonyms:

   adroit, expert, sharp, bright

   Antonyms:

   stupid

3. shrewd or sharp, as a person in dealing with others or as in business dealings.

   a smart businessman.

   Synonyms:

   adept, cunning

4. clever, witty, or readily effective, as a speaker, speech, rejoinder, etc.

5. dashingly or impressively neat or trim in appearance, as persons, dress, etc.

   Synonyms:

   showy, pretentious, spruce

6. socially elegant; sophisticated or fashionable.

   the smart crowd.

   Synonyms:

   chic

7. saucy; pert.

   smart remarks.

8. sharply brisk, vigorous, or active.

   to walk with smart steps.

   Synonyms:

   energetic

9. sharply severe, as a blow, stroke, etc.

10. sharp or keen.

    a smart pain.

    Synonyms:

    penetrating, poignant

11. Digital Technology.

    1. (of a machine, system, etc.) equipped with electronic control mechanisms, software programs, etc., and capable of remote, automated, and seemingly intelligent operation.

       smart copiers;

       smart weapons;

       a smart thermostat.

    2. equipped with microprocessors, as for data processing, internet access, etc. (usually used in combination).

       a smartphone;

       a smartwatch.

12. having properties that can be changed in response to stimuli or environmental conditions; self-regulating.

    smart fabrics that respond to temperature or light.

13. Older Use. considerable; fairly large.

adverb

1. in a smart manner; smartly.

noun

1. a sharp local pain, usually superficial, as from a wound, blow, or sting.

2. keen mental suffering, as from wounded feelings, affliction, grievous loss, etc.

3. Slang. smarts, intelligence; common sense.

   He never had the smarts to use his opportunities.

smart ¹ British  

/ smɑːt /

adjective

1. astute, as in business; clever or bright

2. quick, witty, and often impertinent in speech

   a smart talker

3. fashionable; chic

   a smart hotel

4. well-kept; neat

5. causing a sharp stinging pain

6. vigorous or brisk

7. dialect considerable or numerous

   a smart price

8. (of systems) operating as if by human intelligence by using automatic computer control

9. (of a projectile or bomb) containing a device that allows it to be guided to its target

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verb

1. to feel, cause, or be the source of a sharp stinging physical pain or keen mental distress

   a nettle sting smarts

   he smarted under their abuse

2. (often foll by for) to suffer a harsh penalty

noun

1. a stinging pain or feeling

adverb

1. in a smart manner

Smart ² British  

/ smɑːt /

noun

1. Christopher. 1722–71, British poet, author of A Song to David (1763) and Jubilate Agno (written 1758–63, published 1939). He was confined (1756–63) for religious mania and died in a debtors' prison

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Other Word Forms

• smartingly adverb
• smartish adjective
• smartly adverb
• smartness noun
• supersmart adjective
• supersmartness noun
• ultrasmart adjective
• unsmart adjective
• unsmarting adjective

Etymology

Origin of smart

First recorded before 1050; Middle English (verb) smerten, Old English -smeortan (only in the compound fyrsmeortende “painful like fire”), cognate with Old High German smerzan ( German schmerzen ); (adjective) Middle English smerte, smart “quick, prompt, sharp,” originally, “biting, smarting,” late Old English smearte, akin to the verb; (adverb and noun) Middle English smerte, derivative of the adjective

Explanation

Although smart is most often used to describe someone who is intelligent, you can also call someone a smart, chic dresser or a smart, sassy wisecracker. Smart often implies something good, but not always. If someone cautions you, "Don't be smart with me!" — they are demanding that you stop acting so bold and rude. As a verb, if something smarts, then it hurts. If your knee smarts, then you probably whacked it. However, if someone says that you are a smart dresser or a smart thinker, you can take those comments as compliments.

Example Sentences

In a hotel lounge in London's St Pancras in late February, a young immigration adviser in a smart suit is meeting a client.

From BBC • Apr. 16, 2026

"Our research shows that smart design can reduce the need for increasingly complex hardware and giant superatoms are bringing us one step closer to practically applicable quantum technology."

From Science Daily • Apr. 13, 2026

The fact that you’ve continued to pay your loans suggests you understand that, in the long run, it’s the smart thing to do.

From MarketWatch • Apr. 11, 2026

“That’s why it’s seamless. He’s smart as hell. I’m smart as hell at this game.”

From Los Angeles Times • Apr. 11, 2026

They also probably figured that if the cat was smart enough to blow up a Laundromat, it was smart enough to get away.

From "The Best School Year Ever" by Barbara Robinson

Related Words

• agile
• astute
• bold
• brainy
• bright
• brilliant
• canny
• crafty
• good
• nimble
• quick
• resourceful
• sharp
• shrewd
• slick
• wise