Definition from Wiktionary, the free dictionary
- In English, mass nouns, such as information and money, have no plural form (*informations and *moneys is invalid) and are not used with the indefinite article or numbers in almost all of their senses.
- Conversely many countable nouns can also be used as mass nouns.
- Buying into East Egg rather than West Egg gets you more house for the money.
- Many mass nouns, such as whisky, can also be count nouns when they refer to a variety (“Scotch and Canadian whiskies”) or to denote a serving (“please bring us two whiskies”).
noun describing something that cannot be counted