Definition from macmillandictionary.com
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Sandy’s looking very smart today.
a smart blue suit
Sophie is a smart hard-working student.
If you were smart, you’d buy now before prices go up.
They’re smart enough to ask all the right questions.
Starting a pension scheme now would be a smart move.
a smart question
boys who are punished for being smart in class
a smart answer/attitude
Don’t get smart with me!
one of the smarter suburbs of Rome
a restaurant popular with the smart set
a smart rap on the knuckles
a smartly dressed young man
He moved pretty smartly to block the goal.