American Dictionary
Definition mass noun in American English
mass noun noun
[countable] noun
1
a noun such as 'soap' that is usually uncountable but is also used with 'a' or 'an', or in the plural, to talk about different types of something. For example the noun 'soap' in 'Wash your hands with soap and water' is uncountable, while in 'You should choose a mild soap' and 'Some soaps are very strongly perfumed', 'soap' is countable. A mass noun is used in both these ways.
Synonyms and related words
