"smart" in the noun sense
1. smart, smarting, smartness
a kind of pain such as that caused by a wound or a burn or a sore
"smart" in the verb sense
1. ache, smart, hurt
be the source of pain
"smart" in the adjective sense
showing mental alertness and calculation and resourcefulness
2. chic, smart, voguish
elegant and stylish
"a smart new dress"
"a suit of voguish cut"
3. bright, smart
characterized by quickness and ease in learning
"some children are brighter in one subject than another"
"smart children talk earlier than the average"
4. fresh, impertinent, impudent, overbold, smart, saucy, sassy, wise
improperly forward or bold
"don't be fresh with me"
"impertinent of a child to lecture a grownup"
"an impudent boy given to insulting strangers"
"Don't get wise with me!"
"he gave the dog a smart blow"
quick and brisk
"I gave him a smart salute"
"we walked at a smart pace"
capable of independent and apparently intelligent action
Source: WordNet® (An amazing lexical database of English)
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