What does prevention mean?
Prevention is the act of stopping a problem, harm, or undesirable event before it occurs. It can refer to a general principle or to the specific measures used to protect people, communities, institutions, or the environment. Common examples include disease prevention, crime prevention, fire prevention, and accident prevention. The word often appears in discussions of public policy, medicine, business, and safety because it emphasizes action before damage occurs. In everyday use, prevention may also mean the measures themselves, as in “investing in prevention is better than paying for treatment later.” It is distinct from protection, which can involve helping someone avoid harm, and from correction or remedy, which generally come after a problem has already developed. Understanding prevention highlights the importance of anticipating risks and taking practical steps before they produce serious consequences.
The act or process of stopping something harmful or undesirable from happening.
"The program focuses on the prevention of childhood injuries."
This is the standard modern use of the word. It is often used with social problems or risks, such as crime, disease, and accidents.
A measure or set of safeguards intended to avert harm, loss, or other undesirable outcomes.
"Regular inspections are an important form of prevention."
In this sense, prevention is often used attributively before a noun, as in “prevention strategies” or “prevention programs.”
The plural is grammatically correct but uncommon. Usually, discussion focuses on “prevention” as a process or on particular “prevention measures” rather than on multiple instances called “preventions.”
"The program includes several preventions of common workplace injuries."
Prevention often works best before a problem becomes a crisis: a small safety measure can avert much greater harm later.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does prevention come from?
Prevention entered English through French prévention, which derives from Latin praevenire, meaning “to come before” or “to anticipate.” The underlying idea is to get in front of an event by acting before it happens. The related English word prevent comes from the same Latin root, while preventive and preventable developed from that verb in English. Cognates with the same Latin origin include words such as prevent and preventative, which preserve the sense of forestalling or heading off an event.
Related word forms
How prevention is actually used
The word is common in formal and public-policy contexts, especially when discussing health, safety, crime, and environmental protection. It usually describes action taken before a problem occurs, rather than correction after it has happened.