Phrase guide

reverse osmosis

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

a technique whereby a solution is forced through a semipermeable membrane under pressure; used to generate drinkable water from seawater, or to separate chemical compounds

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

(chemistry) a method of producing pure water; a solvent passes through a semipermeable membrane in a direction opposite to that for natural osmosis when it is subjected to a hydrostatic pressure greater than the osmotic pressure

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: osmosis

History

Etymology

No etymology was provided for this word.

Across languages

Translations

12 source translations are retained for this English entry.

  • Afrikaans: tru-osmose — technique
  • Dutch: omgekeerde osmose — technique
  • Finnish: käänteisosmoosi — technique
  • French: osmose inverse — technique
  • German: Umkehrosmose — technique
  • Italian: osmosi inversa — technique
  • Polish: odwrócona osmoza — technique
  • Portuguese: osmose inversa — technique
  • Portuguese: osmose reversa — technique
  • Romanian: osmoză inversă — technique
  • Spanish: ósmosis inversa — technique
  • Turkish: ters osmoz — technique