purification
n.the process of removing dirty or harmful things from something to make it clean and pure.
n.the removal of contaminants or impurities from a substance or environment. Often describes chemical, industrial, or spiritual processes.
“The city needs a new water purification system.”
“The purification of the local river took several years of strict environmental regulation and community effort.”
“Advanced filtration techniques allow for the purification of industrial wastewater to a degree that it can be safely reintroduced into the local ecosystem without harming aquatic life.”
Uncountable when referring to the general process; countable when referring to a specific instance or method.
“The result can be higher costs for water purification.”
“This built-in purification effect raised the final DNA recovery rate from 14% to 98%.”
From Old French purificacion, from Latin pūrificātiō.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.