1. not made better; not enhanced or developed
2. not developed with buildings, roads, or other structures
Usage: real estate

Examples

• Her test scores remained unimproved despite extra tutoring.
• The patient’s condition was unimproved after the treatment.
• They purchased several acres of unimproved land outside the city.
• The unimproved lot was much cheaper than developed properties.
• His writing skills were largely unimproved from last semester.
• The company bought unimproved real estate for future development.
• After months of practice, her performance was still unimproved.