X is a definite noun or a pronoun.

Note that there must always be a pronoun between a definite noun and the copula.

If we identify a third-person pronoun with a definite noun, it is entirely possible to use the same construction:

The predicate of the copula can also be an adjective; in this case, the subject is a definite noun.

The word for in "fee" can be attached to a definite noun.

A definite noun, in contrast, requires the use of a specific verb when it is the object of a verb.

In Eastern Armenian, the suffix -its is used for both definite and indefinite nouns.

In Norwegian, a definite noun has a suffixed article (cf. above).

And most of the time 'u' is added to make it a definite singular noun, which should be omitted to add the suffixes mentioned above.

Stresses on different vowels make nouns definite or indefinite.