Question

The Grammer code [ U ] means that the noun is.... ​

Answer 1

Nouns do not have a plural form

Answer 2

[U] is for uncountable – uncountable nouns do not have a plural form, and are never preceded by ‘a’, ‘an’, or ‘one’.

Step-by-step explanation:

Examples of uncountable nouns are butter, ice, jewellery, magic.