1. adjective
a) Adjectival; pertaining to or functioning as an adjective.
In fact, God is of not so much importance in Himself, but as the end towards which man tends. That irreverent person who said that Browning uses “God” as a pigment made an accurate criticism of his theology. In Browning, God is adjective to man.
b) Applying to methods of enforcement and rules of procedure.
adjective law
2. noun
A word that modifies a noun or describes a noun’s referent.
The words “big” and “heavy” are English adjectives.
Wikipedia foundation.