(intransitive) To hurt or sting. / (transitive) To cause a smart or sting in.

Exhibiting social ability or cleverness. / (informal) Exhibiting intellectual knowledge, such as that found in books.

A sharp, quick, lively pain; a sting. / Mental pain or suffering; grief; affliction. / Smart-money. / (slang, dated) A dandy; one who is smart in dress; one who is brisk, vivacious, or clever.

(computer hardware) Acronym of self-monitoring, analysis and reporting technology; also S.M.A.R.T.: a monitoring system included in computer HDDs and SSDs in order to detect and report various indicators of drive reliability with the intent of anticipating imminent hardware failures.

(mnemonic) An acronym for remembering desirable characteristics for goal-setting: specific, measurable, attainable, realistic, time-bound. (See |link=w:SMART criteria SMART criteria on Wikipedia.Wikipedia)

Painful, sore. / (figuratively) Experiencing emotional pain or embarrassment.

present participle of smart

A sensation that smarts or stings.

simple past tense and past participle of smart

(uncountable) The state or quality of being smart, intelligence. / (countable) The result or product of being smart.