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= Adjective = In linguistics, an adjective is a word that modifies a noun or noun phrase or describes its referent. Its semantic role is to change information given by the noun.

Adjectives are one of the main parts of speech of the English language, although historically they were classed together with nouns. Certain words that were traditionally considered to be adjectives, including the, this, my, etc., are today usually classed separately, as determiners.

Types of use
Depending on the language, an adjective can precede a corresponding noun on a preposition basis or it can follow a corresponding noun on a post positive basis. Structural, contextual, and style considerations can impinge on the preposition or post-position of an adjective in a given instance of its occurrence. In English, occurrences of adjectives generally can be classified into one of three categories:


 * 1) Pre-positive adjectives, which are also known as "attributive adjectives," occur on an antecedent basis within a noun phrase. For example: "I put my happy kids into the car," wherein happy occurs on an antecedent basis within the my happy kids noun phrase, and therefore functions in a prepositive adjective.
 * 2) Post-positive adjectives can occur: (a) immediately subsequent to a noun within a noun phrase, e.g. "I took a short drive around with my happy kids;" (b) as linked via a copula or other linking mechanism subsequent to a corresponding noun or pronoun; for example: "My kids are happy," wherein happy is a predicate adjective (see also: Predicative expression, Subject complement); or (c) as an appositive adjective within a noun phrase, e.g. "My kids, [who are] happy to go cruising, are in the back seat."
 * 3) Nominalized adjectives, which function as nouns. One way this happens is by eliding a noun from an adjective-noun noun phrase, whose remnant thus is a nominalization. In the sentence, "I read two books to them; he preferred the sad book, but she preferred the happy", happy is a nominalized adjective, short for "happy one" or "happy book". Another way this happens is in phrases like "out with the old, in with the new", where "the old" means "that which is old" or "all that is old", and similarly with "the new". In such cases, the adjective may function as a mass noun (as in the preceding example). In English, it may also function as a plural count noun denoting a collective group, as in "The meek shall inherit the Earth", where "the meek" means "those who are meek" or "all who are meek".

Distribution
Adjectives feature as a part of speech (word class) in most languages. In some languages, the words that serve the semantic function of adjectives are categorized together with some other class, such as nouns or verbs. In the phrase "a Ford car", "Ford" is unquestionably a noun but its function is adjectival: to modify "car". In some languages adjectives can function as nouns: for example, the Spanish phrase "uno rojo" means "a red [one]".

As for "confusion" with verbs, rather than an adjective meaning "big", a language might have a verb that means "to be big" and could then use an attributive verb construction analogous to "big-being house" to express what in English is called a "big house". Such an analysis is possible for the grammar of Standard Chinese, for example.

Different languages do not use adjectives in exactly the same situations. For example, where English uses "to be hungry" Dutch, French, and Spanish use "honger hebben", "avoir faim", and "tener hambre" respectively (literally "to have hunger", the words for "hunger" being nouns). Similarly, where Hebrew uses the adjective English uses the verb "to need".

In languages that have adjectives as a word class, it is usually an open class; that is, it is relatively common for new adjectives to be formed via such processes as derivation. However, Bantu languages are well known for having only a small closed class of adjectives, and new adjectives are not easily derived. Similarly, native Japanese adjectives (i-adjectives) are considered a closed class (as are native verbs), although nouns (an open class) may be used in the genitive to convey some adjectival meanings, and there is also the separate open class of adjectival nouns.