This means a person is good at thinking, learning, and understanding things quickly. We often use it to describe people who solve problems well.
She is very smart and learns fast.
He gave a smart answer in class.
This use means someone or something looks neat and well-dressed. It is often used to talk about clothes or style.
He wore a smart suit to the party.
She looks smart in her new dress.
This means being clever in actions or plans, especially to get good results. It often means being practical and skillful.
She made a smart decision to save money.
They used a smart way to solve the problem.
This use describes modern machines or devices that can do many things by using computer technology or internet connection.
I have a smart phone with many apps.
Smart TVs can connect to the internet.