metanouns
Metanouns are a proposed category of linguistic items whose primary referent is a linguistic category rather than a concrete or individual entity. They function at a meta-linguistic level, used to talk about nouns and noun-related properties within discourse about language, grammar, or semantics. The concept is used to describe words that name categories such as noun, kind, class, type, or category itself, rather than items in the world.
In practice, metanouns behave like ordinary nouns in many syntactic environments. They can be subjects, objects,
Common examples cited include the words noun, proper noun, common noun, countable noun, uncountable noun, term,
The term is not universally standardized and its use varies. Some linguists describe metanouns as metalinguistic
See also: metalinguistics, nominal classification, lexicon, terminology.