Noun

In grammar, a noun is a word that names a person, place, thing, or idea. Nouns help us talk about everything around us, from real objects like trees and cars to abstract concepts like love and courage. They are important building blocks in sentences because they often act as the subject or object.

Nouns can be found in many forms, such as common nouns like "dog" or proper nouns like "Paris." They can work together with words like determiners and adjectives. In studying languages, nouns are a key part of speech that behave in special ways depending on the language.

Every language uses nouns, but how they are used can change. For example, some languages treat certain words as nouns differently than others. Understanding nouns helps us speak and write clearly in any language.

History

See also History of parts of speech

Word classes, also called parts of speech, were first described by Sanskrit grammarians around the 5th century BC. In the work of Yāska called Nirukta, the noun (nāma) was one of the four main types of words.

The Ancient Greek word for noun was ónoma, mentioned by Plato in the book Cratylus. Later, it was listed as one of the eight parts of speech in The Art of Grammar by Dionysius Thrax from the 2nd century BC. In Latin grammar, the term was nōmen. All these words for "noun" also meant "name." The English word noun comes from the Latin term, through the Anglo-Norman word nom.

These word classes were grouped based on the forms they take. In Sanskrit, Greek, and Latin, nouns are grouped by gender and change form for case and number. Because adjectives share these same groups, they were often put in the same class as nouns.

The Latin word nōmen included both nouns and adjectives, and the same was true for the English word noun. The two were later separated into nouns substantive and nouns adjective. Today, the word nominal can refer to both nouns and adjectives.

Many European languages use a version of the word substantive for noun, like Spanish sustantivo. In English, some writers use substantive to mean both single-word nouns and noun phrases. It can also describe when a noun is the main word in a phrase, like knee in my knee hurts, compared to when it describes something else, like in knee replacement.

Examples

Nouns are words that name people, places, things, or ideas. Here are some examples:

• The cat sat on the chair.
• Please hand in your assignments by the end of the week.
• Cleanliness is next to godliness.
• Plato was an influential philosopher in ancient Greece.

A noun can be used with a word like "the" or an describing word. Verbs and describing words cannot be used this way. For example:

• the name (name is a noun: can be used with "the")
• constant circulation (circulation is a noun: can be used with the describing word constant)
• a fright (fright is a noun: can be used with a)
• terrible fright (the noun fright can be used with the describing word terrible)

Characterization and definition

Nouns can change based on rules like gender, case, and number, but these rules can differ between languages.

Nouns often name people, places, things, events, or ideas. Some nouns, like "behalf" or "sake," don’t refer to anything on their own. Other words, such as verbs or adjectives, can also point to things, making the definition of nouns a bit tricky.

A useful way to think about nouns is that they can be the main word in a phrase that points to something specific.

Classification

Nouns can be grouped in different ways based on how they work in a language. They can be sorted by how they change with prefixes or suffixes, and how they fit with other words in sentences.

In some languages, nouns have genders like masculine, feminine, and neuter. For example, in French, nouns change depending on whether they are masculine or feminine, affecting the words that go with them. English doesn’t usually use grammatical gender for most nouns, though some still refer to specific sexes like "girl" or "boy".

Nouns can also be proper or common. Proper nouns name specific things like people, places, or objects, such as "India" or "Jupiter", and are usually capitalized. Common nouns are more general, like "country" or "animal".

There are also countable nouns, which can be counted and used with numbers like "chair" or "nose". Mass nouns cannot be counted this way, like "furniture". Some nouns can be both, such as "soda", which can be counted in "three sodas" or used generally in "he likes soda".

Collective nouns name groups of things or people, like "committee" or "government". These can be treated as singular or plural depending on whether we think of the group as a whole or its members individually.

Concrete nouns refer to things we can see, touch, or sense, like "chair" or "apple". Abstract nouns refer to ideas or concepts, like "justice" or "anger". Some nouns can be both, like "art", which can mean an abstract idea or a concrete object.

Noun phrases

A noun phrase is a group of words that starts with a noun, a special name, or a pronoun. Sometimes, words like "the" or adjectives like "big" come before the noun to give more information. For example, in the sentence "The dog sat near Ms Curtis and wagged its tail," there are three noun phrases: "the dog," "Ms Curtis," and "its tail." In "You became their teacher," the noun phrases are "you" and "their teacher."

Nouns in relation to other word classes

Main article: Pronoun
Main article: Nominalization

Nouns can often be replaced by words called pronouns, like he, it, she, or they. Pronouns help us avoid repeating the same noun over and over. For example, in the sentence "Gareth thought she was weird," the word she stands in for a person, just like the noun Gareth does.

Sometimes words from other groups, like adjectives, can act like nouns. This is called nominalization. In some languages, adjectives can even describe people. For example, in French or Spanish, adjectives might be used to talk about someone with certain qualities. In English, we sometimes do this too.