- 1to experience a chemical change because of the action of yeast or bacteria, often changing sugar to alcohol; to make something change in this way Fruit juices ferment if they are kept for too long.
- 2(figurative) A blend of emotions fermented inside her. ferment something Red wine is fermented at a higher temperature than white.
- NAmE//ˌfərmɛnˈteɪʃn//, NAmE//ˌfərmənˈteɪʃn//noun [uncountable] Sugar is converted into alcohol by a process of fermentation.
NAmE//fərˈmɛnt//[intransitive, transitive]Verb Forms present simple I / you / we / they ferment
he / she / it ferments
past simple fermented
-ing form fermenting
fermentationjump to other results