Capable of destroying bacteria or inhibiting their growth, a property claimed by substances from antibiotics to disinfectants to treated cutting boards. True antibacterial agents include antibiotics that kill pathogens inside the body and biocides such as chlorine and quaternary ammonium compounds that sanitize food-contact surfaces. The term also appears in marketing for soaps, textiles, and plastics, where its value is debated: routine household use of antibacterial products offers little benefit over plain soap and water while potentially encouraging resistance. In food processing, antibacterial interventions must be validated to actually reduce pathogens without leaving harmful residues or creating resistant survivors. The distinction between antibacterial, which targets bacteria specifically, and the broader antimicrobial matters for choosing the right tool for each hygiene challenge.