In grammar, an adjective is a word whose main syntactic role is to modify a noun or pronoun, giving more information about the noun or pronoun's referent. Collectively, adjectives form one of the traditional English eight parts of speech, though linguists today distinguish adjectives from words such as determiners that also used to be considered adjectives.
Not all languages have adjectives, but most, including English, do. (English adjectives include big, old, and tired, among many others.) Those that do not, typically use words of another part of speech, often verbs, to serve the same semantic function;
In most languages with adjectives, they form an open class of words; that is, it is relatively common for new adjectives to be formed via such processes as derivation
In English grammar the degree of comparison of an adjective or adverb describes the relational value of one thing with something in another clause of a sentence.
The degree of comparison may be expressed morphologically, or syntactically. morphological degrees of comparison: green (positive), greener (comparative), greenest (superlative); pretty, prettier, prettiest; while most polysyllabic adjectives use syntax: complex, more complex, most complex.
The positive degree is the most basic form of the adjective, positive because it does not relate to any superior or inferior qualities of other things in speech.
The comparative degree denotes a greater amount of a quality relative to something else. The phrase “Anna is taller than her father” means that Anna's degree of tallness is greater than her father's degree of tallness.
The superlative degree denotes the most, the largest, etc., by which it differs from other things.
