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.

plural of smartness

A surname.

plural of smarting

(obsolete) painful

Third-person singular simple present indicative form of smart off

(informal) Practical knowledge, especially concerning human behavior.

(slang, sometimes vulgar) A person regarded with an obnoxiously determined advancement of one's own personality, wishes, or views.

Characteristic of a smart aleck