What does sanitise mean?
Sanitise means to make something clean, safe, or free from harmful contamination. Its most familiar use refers to cleaning or disinfecting physical objects, such as work surfaces, medical instruments, food, or laboratory equipment. The verb also has an important modern application to information: data may be sanitised by removing names, identifying numbers, photographs, or other details that could compromise privacy or security. In this second sense, sanitisation is often deliberate and controlled rather than a simple act of tidying. The word conveys more than ordinary cleanliness because it implies that a harmful, unsafe, or otherwise unwanted element has been neutralised or removed. It is especially common in healthcare, food preparation, laboratories, hospitality, and data-security contexts. The British spelling is sanitise, while the corresponding US spelling is sanitize.
To clean, disinfect, or otherwise treat something so that harmful or undesirable elements are removed, reduced, or rendered safe.
"Restaurant staff must sanitise the preparation area at regular intervals."
This sense is especially common in healthcare, food hygiene, laboratory work, and cleaning instructions.
To remove or obscure sensitive or personally identifying information from data before it is published, shared, or otherwise processed.
"The application sanitises user data before sharing it with third-party researchers."
This figurative and technical use is common in computing, privacy, records management, and information security.
The same word that helps laboratories scrub out harmful microbes can also scrub identifying details out of public records.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sanitise come from?
Sanitise was formed in the early 19th century from the Latin-derived adjective sanitary and the suffix -ise. The wider word family comes from Latin sanitas, meaning health or soundness, which also underlies sane, sanity, sanitary, and sanitation. These words share a common history associated with health, cleanliness, and the condition of being sound or free from disease.
Related word forms
How sanitise is actually used
The verb is common in British, Australian, and other varieties using British spelling; US English generally uses sanitize. In the privacy and information-security sense, it often implies deliberately removing or concealing personally identifiable information rather than merely cleaning a physical object.
Easily confused with sanitise
To sanitise is to make something clean or safe from harmful elements, whereas to sanctify is to treat something as sacred or morally worthy.