What does safety mean?
Safety means the condition of being free from harm, danger, or injury, as well as the protection and careful practices used to keep people, property, or environments secure. It appears in expressions such as public safety, workplace safety, and safety equipment, where it usually describes precautions that reduce the likelihood or consequences of accidents. The word can also refer to an individual protective mechanism, such as a safety valve or safety barrier. In everyday use, “safety” often carries a reassuring or practical connotation, emphasizing caution and prevention. It is related to, but not identical with, “security”: safety concerns the avoidance of harm and danger, while security can additionally involve protection against theft, intrusion, espionage, or threats to information. Because safety is commonly an abstract condition, it is generally used as an uncountable noun, although countable forms occur in technical contexts.
The condition of being protected from harm, danger, injury, or loss.
"The employees were told to prioritise safety at all times."
Usually uncountable in general usage: “in safety,” “a concern for safety,” or “to ensure safety.”
A protective measure, device, or feature designed to prevent accidents or reduce danger.
"The emergency cut-off is an important safety on the machine."
This countable sense is especially common in technical, industrial, automotive, and regulatory contexts.
The plural is uncommon in general usage but is standard when referring to individual protective devices or mechanisms, as in vehicle safety equipment or industrial safeguards.
"The technicians checked all the machine's safeties before restarting production."
Safety is not the absence of danger; it is the deliberate practice of reducing the chances that danger will cause harm.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does safety come from?
The word “safety” entered Middle English through Old French forms related to Latin salūs, meaning safety, health, or well-being. Its modern English development follows the same broad root found in words such as “safe,” “secure,” “security,” and “salvage,” all of which are associated with being sound, unharmed, or protected. The noun “safety” developed alongside the older adjective “safe,” which was likewise influenced by Latin salvus, meaning safe or sound.
Related word forms
How safety is actually used
Safety is commonly uncountable when referring to the general condition of being safe. In technical and legal contexts, it can also be countable when referring to individual protective measures or devices.
Easily confused with safety
Safety primarily means freedom from harm or danger, whereas security more often refers to protection against threats, including theft, intrusion, or loss of confidential information.