adjective

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The part of speech that modifies a noun or other substantive by limiting, qualifying, or specifying and distinguished in English morphologically by one of several suffixes, such as -able, -ous, -er, and -est, or syntactically by position directly preceding a noun or nominal phrase.
2. n. Any of the words belonging to this part of speech, such as white in the phrase a white house.
3. adj. Adjectival: an adjective clause.
4. adj. Law Prescriptive; remedial: adjective law.
5. adj. Not standing alone; derivative or dependent.

Century Dictionary and Cyclopedia

1. Naming or forming an adjunct to a noun: as, an adjective name. Pertaining to an adjective: as, the adjective use of a noun. Added or adjected; additional.
2. n. In grammar, a word used to qualify, limit, or define a noun, or a word or phrase which has the value of a noun; a part of speech expressing quality or condition as belonging to something: thus, whiteness is the name of a quality, and is a noun; white means possessing whiteness, and so is an adjective. The adjective is used attributively, appositively, or predicatively: thus, attributively in “a wise ruler”; appositively, in “a ruler wise and good”; predicatively, in “the ruler is wise.” Commonly abbreviated to a. or adjective
3. n. A dependant or an accessory; a secondary or subsidiary part.
4. To make an adjective of; form into an adjective; give the character of an adjective to.

Wiktionary

1. adj. Incapable of independent function.
2. adj. Adjectival; pertaining to or functioning as an adjective.
3. adj. Applying to methods of enforcement and rules of procedure.
4. adj. Of a dye that needs the use of a mordant to be made fast to that which is being dyed.
5. n. A word that modifies a noun or describes a noun’s referent.

GNU Webster's 1913

1. adj. Added to a substantive as an attribute; of the nature of an adjunct.
2. adj. Not standing by itself; dependent.
3. adj. Relating to procedure.
4. 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.
5. n. A dependent; an accessory.
6. v. To make an adjective of; to form or change into an adjective.

WordNet 3.0

1. n. a word that expresses an attribute of something
2. n. the word class that qualifies nouns
3. adj. of or relating to or functioning as an adjective
4. adj. relating to court practice and procedure as opposed to the principles of law