1. Natural or biological mechanisms and systems that protect organisms from disease, infection, or harmful substances.
Usage: Plural form; often used in scientific and medical contexts.; Can refer to immune system components or defensive strategies in living organisms.
2. Measures, technologies, or strategies designed to protect against biological threats, including bioterrorism or disease outbreaks.
Usage: Used in public health, security, and policy contexts.; Often refers to preparedness and response systems.

Examples

• The human body's biodefenses include antibodies, white blood cells, and the skin barrier.
• Scientists study plant biodefenses to understand how crops resist pathogens.
• Government agencies invest in biodefenses to prepare for potential pandemics.
• Vaccination strengthens our biodefenses against infectious diseases.
• Biodefenses in the respiratory system help trap and eliminate harmful particles.
• The country developed comprehensive biodefenses following the disease outbreak.