To disinfect means to kill harmful germs on surfaces or objects using special chemicals or methods. When you disinfect a kitchen counter, you're destroying invisible bacteria and viruses that could make people sick, going beyond just wiping away visible dirt. Hospitals disinfect operating rooms between surgeries. Schools disinfect desks and doorknobs to help stop the spread of illness.

Disinfection is stronger than regular cleaning. Soap and water remove dirt and some germs, but disinfecting actually kills most of the dangerous microorganisms left behind. Common disinfectants include bleach solutions, rubbing alcohol, and special cleaning products labeled as disinfectants.

When you disinfect something, you're making it safer to touch or use again. Doctors disinfect their instruments, water treatment plants disinfect drinking water, and parents might disinfect toys after a child has been sick. Understanding the difference between cleaning (removing dirt), disinfecting (killing germs), and sterilizing (removing all microorganisms) helps you know when each approach matters most.