Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “saponification”


noun [U] /səˌpɑn·ə·fɪˈkeɪ·ʃən/
chemistry the chemical reaction between a fat or oil and an alkali which produces soap
(Definition of saponification from the Cambridge Academic Content Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Word of the Day


a type of dark brown beer with a bitter taste

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More