1. to make or become more neat, tidy, or well-dressed in appearance
Usage: third person singular present tense of ‘smarten’

Examples

• She smartens up her appearance before important meetings.
• The new paint job really smartens the old house.
• He smartens his tie and checks his reflection.
• The landscaping smartens the front yard considerably.
• A fresh haircut always smartens one’s look.
• The store owner smartens the display window each morning.