What does biosecurity mean?
Biosecurity refers to the set of measures taken to prevent the introduction or spread of harmful biological organisms—such as disease-causing pathogens, agricultural pests, and invasive species—and to keep dangerous biological materials out of the wrong hands. The term is most prominent in farming and veterinary medicine, where strict biosecurity protocols like disinfection stations, controlled access, and quarantine help stop outbreaks of livestock disease, but it also applies to laboratories handling dangerous pathogens and to national efforts against bioterrorism. Closely related to but distinct from biosafety, which focuses on protecting people from accidental exposure, biosecurity emphasizes prevention and containment before harm occurs. It is a formal, technical word central to modern discussions of food safety, public health, and pandemic preparedness, reflecting a growing recognition that managing biological risk is essential to society.
nounMeasures and practices designed to prevent the introduction or spread of harmful organisms—such as pests, pathogens, and invasive species—to protect human, animal, plant, and environmental health.
- Protective measures preventing the introduction or spread of pests, diseases, and invasive species in agriculture and the environment (the dominant sense).
- Security precautions preventing the theft, loss, misuse, or deliberate release of dangerous biological agents and toxins, especially in laboratories and research.
"The farm tightened its biosecurity protocols after an outbreak of avian influenza in a neighboring county."
"Strict biosecurity at poultry farms helped contain the outbreak before it reached other states."
"The laboratory's biosecurity review found gaps in how pathogen samples were stored and tracked."
Rarely pluralized; biosecurity is almost always used as an uncountable mass noun referring collectively to protective measures.
"Multiple layers of biosecurity protected the facility."
The word 'biosecurity' barely existed before the 1990s—today it governs everything from airport footbaths to how labs store deadly pathogens.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of biosecurity
Biosecurity is a twentieth-century compound formed from Greek-derived 'bio-' (life) and 'security', which traces back through Old French to the Latin 'securus' (free from care, safe)—itself from 'se-' (apart) plus 'cura' (care). The compound emerged as a technical term in the late twentieth century, gaining prominence from the 1980s and 1990s onward as concerns about agricultural disease, invasive species, and biological weapons grew. It shares its Latin root with words such as 'secure', 'sure', and 'assure'.
Related word forms
How biosecurity is actually used
A formal, technical term used mainly in agricultural, veterinary, public-health, and laboratory contexts; it carries a serious, precautionary connotation and is common in government policy and scientific writing rather than everyday conversation.
Easily confused with biosecurity
Biosafety protects laboratory workers and the public from accidental exposure to dangerous biological agents, whereas biosecurity prevents the deliberate misuse, theft, or release of those agents—or the spread of harmful organisms more broadly.
Biodefense refers specifically to military and governmental countermeasures against biological weapons, while biosecurity is a broader preventive concept covering agriculture, health, and research.