1.Definition: capable of independent and apparently intelligent action

"Smart weapons"

2.Definition: characterized by quickness and ease in learning

"Smart children talk earlier than the average"

Related Adjective(s):bright

3.Definition: elegant and stylish

"A smart new dress"

Related Adjective(s):chic, voguish

4.Definition: improperly forward or bold

Related Adjective(s):fresh, impertinent, impudent, overbold, sassy, saucy, wise

5.Definition: painfully severe

"He gave the dog a smart blow"

6.Definition: quick and brisk

"I gave him a smart salute", "We walked at a smart pace"

7.Definition: showing mental alertness and calculation and resourcefulness