Adnoun is a linguistic term used with two different meanings.
See main article: article and Nominalized adjective. An adnoun is a kind of lexical category. In English, it is a word that is usually an adjective, but is being used as a noun.[1] [2] The origin of the word is thought to date to around 1763-1792.[2] Often these usages are simply identified as the noun form of the word.
Examples:
Adnoun is an alternative term, which is considered to be archaic, for adjective. As John Eliot states in his 1666 Indian Grammar Begun..., "An Adnoun is a part of Speech that attendeth upon a Noun, and signifieth the Qualification thereof."