(1):

(n.) Added to a substantive as an attribute; of the nature of an adjunct; as, an adjective word or sentence.

(2):

(v. t.) To make an adjective of; to form or change into an adjective.

(3):

(n.) Not standing by itself; dependent.

(4):

(n.) Relating to procedure.

(5):

(n.) A word used with a noun, or substantive, to express a quality of the thing named, or something attributed to it, or to limit or define it, or to specify or describe a thing, as distinct from something else. Thus, in phrase, "a wise ruler," wise is the adjective, expressing a property of ruler.

(6):

(n.) A dependent; an accessory.