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Category:English invariant nouns

Definition from Dictionary, a free dictionary
The happiest people are those who think the most interesting thoughts. Those who decide to use leisure as a means of mental development, who love good music, good books, good pictures, good company, good conversation, are the happiest people in the world. And they are not only happy in themselves, they are the cause of happiness in others.
William Lyon Phelps
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A few English nouns do not change when inflected into the plural. These are known as "invariant nouns" (or "invariable nouns").

Note: These are not to be confused with pluralia tantum (such as bagpipes) or with uncountable nouns (also known as mass nouns and non-count nouns; invariant nouns can still be counted as in "one sheep, two sheep").

Invariant use of non-invariant nouns

Sometimes in English, the singular form of a non-invariant noun may be used to denote a plural. This should be carefully distinguished from true invariants, where there is no plural form, as in the case of 'sheep'.

Generally, this happens with only a very few kinds of noun :

Entries in category “English invariant nouns”

The following 25 pages are in this category, out of 25 total.