What does desalinisation mean?
Desalinisation refers to the process of removing dissolved salts from seawater or brackish water so that it becomes fit for human consumption, agriculture, or industrial use. It is the form of the word preferred in British English, while American English typically spells it desalination. As water scarcity intensifies across the Middle East, Australia, and coastal regions worldwide, desalinisation has become an increasingly prominent term in environmental journalism, engineering reports, and public policy debates. Large-scale plants use either reverse-osmosis membranes that filter salt from water under pressure, or thermal methods that boil and recondense seawater. Though the word is technical and neutral in tone, it often appears in discussions carrying broader implications about climate adaptation, energy consumption, and the environmental cost of securing fresh water for growing populations.
nounThe removal of salt, especially from seawater, to make it suitable for drinking or irrigation; the British spelling of the process more commonly called desalination.
- The technical or industrial process of removing dissolved salts from seawater or brackish water to produce fresh water.
"Australia invested heavily in desalinisation after the millennium drought left its reservoirs critically low."
"The island's survival depends on a desalinisation facility capable of producing millions of litres a day."
"Advances in membrane technology have made desalinisation considerably cheaper over the past two decades."
Rarely pluralised; usually treated as an uncountable mass noun referring to the process generally.
"Different coastal regions have adopted different approaches to their desalinisations."
Every glass of water in Israel traces back to the sea — the country now gets most of its drinking water through this very process.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of desalinisation
Desalinisation derives from the prefix de- ('removal') combined with 'saline', which comes from Latin salinus ('of salt'), itself rooted in Latin sal meaning 'salt'. The same Latin root gave English related terms such as saline, salinity, and even salary, reflecting Roman soldiers' association with salt allowances. The word formed alongside other -ise/-ize process nouns during the modern era of industrial chemistry, with the variant spelling using '-t-' (desalination) becoming dominant especially in American usage.
Related word forms
How desalinisation is actually used
This spelling is chiefly British; American English overwhelmingly uses 'desalinisation' spelled with a 't' as 'desalination'. The word carries a neutral, technical register and appears mostly in engineering, environmental policy, and news coverage of water scarcity.
Easily confused with desalinisation
Desalination is simply the standard American spelling of exactly the same word and process, differing only in spelling.