Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mould”


noun UK (US mold)     /məʊld/
SUBSTANCE [U] a green or black substance that grows in wet places or on old foodBacteria, moulds, germs and viruses
CONTAINER [C] a container that is used to make something in a particular shape: a chocolate mouldModels and moulds
(Definition of mould noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “mould” in other dictionaries

Word of the Day


a person or group who receives money, advantages, etc. as a result of something else

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