Different definitions of nouns

In traditional school grammars, one often encounters the definition of nouns that they are all and only those expressions that refer to a person, place, thing, event, substance, quality, or idea, etc. This is a semantic definition. It has been criticized by contemporary linguists as being uninformative.

Contemporary linguists generally agree that one cannot successfully define nouns (or other grammatical categories) in terms of what sort of object in the world they refer to or signify. Part of the conundrum is that the definition makes use of relatively general nouns (thing, phenomenon, event) to define what nouns are.

The existence of such general nouns demonstrates that nouns refer to entities that are organized in taxonomic hierarchies. But other kinds of expressions are also organized into such structured taxonomic relationships. For example the verbs stroll, saunter, stride, and tread are more specific words than the more general walk

. Moreover, walk is more specific than the verb move, which, in turn, is less general than change. But it is unlikely that such taxonomic relationships can be used to define nouns and verbs. We cannot define verbs as those words that refer to changes or states, for example, because the nouns change and state probably refer to such things, but, of course, aren't verbs. Similarly, nouns like invasion, meeting, or collapse refer to things that are done or happen. In fact, an influential theory has it that verbs like kill or die refer to events

The point being made here is not that this view of verbs is wrong, but rather that this property of verbs is a poor basis for a definition of this category, just like the property of having wheels is a poor basis for a definition of cars (some things that have wheels, such as most suitcases or a jumbo jet, aren't cars). Similarly, adjectives like yellow or difficult might be thought to refer to qualities, and adverbs like outside or upstairs seem to refer to places, which are also among the sorts of things nouns can refer to. But verbs, adjectives and adverbs are not nouns, and nouns aren't verbs, adjectives or adverbs. One might argue that definitions of this sort really rely on speakers' prior intuitive knowledge of what nouns, verbs and adjectives are, and, so don't really add anything over and this. Speakers' intuitive knowledge of such things might plausibly be based on formal criteria, such as the traditional grammatical definition of English nouns aforementioned.

APPENDIX 2

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