* "The new phone is very smart, with features like voice control and facial recognition." (meaning intelligent or technologically advanced)
* "She's a smart dresser, always choosing stylish outfits that flatter her." (meaning stylish or fashionable)
* "It's smart to wear a hat in the sun to protect your skin." (meaning sensible or practical)
* "The children were smart enough to know they shouldn't play with matches." (meaning intelligent or quick-witted)
* "He's got a smart mouth, always making sarcastic remarks." (meaning witty or clever, but often in a disrespectful way)
* "That's a smart move, investing in real estate now." (meaning clever or shrewd)
The meaning of "smart" can vary depending on the context. Do you have a specific kind of sentence in mind?