In linguistics, an adjective is a "describing word", the main syntactic role of which is to qualify a noun or noun phrase, giving more information about the object signified.[1]
Adjectives are one of the traditional eight English parts of speech, although linguists today distinguish adjectives from words such as determiners that formerly were considered to be adjectives. In the immediately previous sentence, "traditional" is an adjective and "eight", while known traditionally as an adjective, is now classified as a determiner; and in the preceding paragraph, both "main" and "syntactic" are traditional adjectives.