verb (used without object)
to be a source of sharp, local, and usually superficial pain, as a wound.
to be the cause of a sharp, stinging pain, as an irritating application, a blow, etc.
to feel a sharp, stinging pain, as in a wound.
to suffer keenly from wounded feelings: She smarted under their criticism.
to feel shame or remorse or to suffer in punishment or in return for something.
verb (used with object)
to cause a sharp pain to or in.
adjective, smarter, smartest.
quick or prompt in action, as persons.
having or showing quick intelligence or ready mental capability: a smart student.
shrewd or sharp, as a person in dealing with others or as in business dealings: a smart businessman.
clever, witty, or readily effective, as a speaker, speech, rejoinder, etc.
dashingly or impressively neat or trim in appearance, as persons, dress, etc.
socially elegant; sophisticated or fashionable: the smart crowd.
saucy; pert: smart remarks.
sharply brisk, vigorous, or active: to walk with smart steps.
sharply severe, as a blow, stroke, etc.
sharp or keen: a smart pain.
(of a machine, system, etc.) equipped with electronic control mechanisms and capable of automated and seemingly intelligent operation: smart copiers; smart weapons.
having properties that can be changed in response to stimuli or environmental conditions; self-regulating: smart fabrics that respond to temperature or light.
Computers. intelligent ( def 4 ).
Older Use. considerable; fairly large.
in a smart manner; smartly.
a sharp local pain, usually superficial, as from a wound, blow, or sting.
keen mental suffering, as from wounded feelings, affliction, grievous loss, etc.
smarts, Slang. intelligence; common sense: He never had the smarts to use his opportunities.

before 1050; (v.) Middle English smerten, Old English -smeortan (only in the compound fyrsmeortende painful like fire), cognate with Old High German smerzan (German schmerzen); (adj.) Middle English smerte, smart quick, prompt, sharp, orig., biting, smarting, late Old English smearte, akin to the v.; (adv. and noun) Middle English smerte, derivative of the adj.

smartingly, adverb
smartly, adverb
smartness, noun
supersmart, adjective
supersmartly, adverb
supersmartness, noun
ultrasmart, adjective
unsmart, adjective
unsmarting, adjective

1. pain, hurt, sting. 7. lively, nimble, agile, alert, active. 8. bright, sharp, expert, adroit. 9. cunning, adept. 11. spruce; pretentious, showy. 12. chic. 14. energetic. 16. stinging, poignant, penetrating.

8. stupid. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
smart (smɑːt)
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
10.  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
11.  (often foll by for) to suffer a harsh penalty
12.  a stinging pain or feeling
13.  in a smart manner
[Old English smeortan; related to Old High German smerzan, Latin mordēre to bite, Greek smerdnos terrible]

Smart (smɑːt)
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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. smeortan "be painful," from W.Gmc. *smert- (cf. M.Du. smerten, Du. smarten, O.H.G. smerzan, Ger. schmerzen "to pain," originally "to bite"), from PIE base *(s)merd-, from base *(s)mer- "to rub, pound" (cf. Gk. smerdnos "terrible, dreadful," Skt. mardayati "grinds, rubs, crushes," L. mordere to bite").

late O.E. smeart "sharp, severe, stinging," related to smeortan (see smart (v.)). Meaning "quick, active, clever" is attested from c.1300, probably from the notion of "cutting" wit, words, etc.; meaning "trim in attire" first attested 1718, "ascending from the kitchen to the
drawing-room c.1880." [Weekley] In ref. to devices, "behaving as though guided by intelligence" (e.g. smart bomb) first attested 1972. Smarts "good sense, intelligence," is first recorded 1968. Smart aleck is from 1865, perhaps in allusion to Aleck Hoag, notorious pimp, thief, and confidence man in New York City in early 1840s. Smart cookie is from 1948; smarty-pants first attested 1941.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Paying your mortgage is probably smarter than snagging a designer purse, but
  there's always window-shopping.
For some reason, human beings seemed to be getting smarter.
It's a question not necessarily of spending less but of learning how to spend
All of a sudden, artists are again plainly smarter in their bones than art
  intellectuals are in their brains.
Related Words
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