1. a condition that prevents the body or mind from working normally; an illness
2. a harmful condition that affects plants
3. something that causes harm to a society or organization
Usage: figurative

1. to cause disease in; to make unhealthy
Usage: formal

Examples

• Heart disease is a leading cause of death.
• The doctor diagnosed her with a rare genetic disease.
• A fungal disease killed many of the oak trees.
• Corruption is a disease that weakens democracy.
• Poor sanitation can disease entire communities.
• The plants were diseased by the contaminated soil.