Adjective phrase modifiers in English grammar are words and phrases that that modify or describe an adjective or adjective phrase. Adjective phrase modifier is a grammatical function.
Definition. A word, phrase, or clause that functions as an adjective or adverb to provide additional information about another word or word group (called the head). Modifiers in English include adjectives, adverbs, demonstratives, possessive determiners, prepositional phrases, degree modifiers, and intensifiers. Adjective phrase modifiers in English grammar are words and phrases that that modify or describe an adjective or adjective phrase. Adjective phrase modifier is a grammatical function. The grammatical form that can function as the adjective phrase modifier in English grammar is the adverb phrase. Adjective phrase modifiers are constituents of the adjective phrase. References. Brinton, Laurel J. & Donna M. Brinton. 2010. The linguistic structure of Modern English, 2nd edn. Compound modifiers are grammatically equivalent to single-word modifiers, and can be used in combination with other modifiers. Note that in the preceding sentence, single-word is itself a compound modifier. The constituent words of compound modifiers need not be adjectives; combinations of nouns, determiners, and other parts of speech are also common: man-eating (shark) and one-way (street) . 2. : a word or phrase that makes specific the meaning of another word or phrase. 3. : a gene that modifies the effect of another. See modifier defined for English-language learners. See modifier defined for kids. 1. modifier-a content word that qualifies the meaning of a noun or verb. qualifier. content word, open-class word-a word to which an independent meaning can be assigned. phrase-an expression consisting of one or more words forming a grammatical constituent of a sentence. 1. a person or thing that modifies. 2. a word, phrase, or sentence element that limits or qualifies the sense of another word, phrase, or element in the same construction. [1575–85]. usage: See dangling participle, misplaced modifier. Definition. There are two types of modifiers in the English language: the adjective and the adverb. They have distinctly different roles, and we will examine each, in turn. First, let's look at the definition of each word. An adjective describes, or modifies a noun--a person, place, thing, or idea. Adjectives may be single words, or they may be whole phrases. The adverb is different from an adjective in that it primarily modifies verbs, but it may also modify adjectives or other adverbs Modifiers. A modifier can be an adjective, an adverb, or a phrase or clause acting as an adjective or adverb In every case, the basic principle is the same: the modifier adds information to another element in the sentence. A dangling modifier is usually a phrase or an elliptical clause -- a dependent clause whose subject and verb are implied rather than expressed -- that functions as an adjective but does not modify any specific word in the sentence, or (worse) modifies the wrong word. Definition: A word group with an adjective as its head. This adjective may be accompanied by modifiers, determiners, and/or qualifiers. Adjective phrases modify nouns. They may be attributive (appearing before the noun) or predicative (appearing after a linking verb), but not all adjectives can be used in both positions. See Examples and Observations, below. 1 An adjective phrase consists of an adjective which may be preceded and/or followed by other words. 2  The premodifier is always an adverb phrase, but the post-modifiers can be an adverb phrase, a prepositional phrase, or even a clause. A modifier is a word, phrase, or clause which functions as an adjective or an adverb to describe a word or make its meaning more specific. 
http://grammar.about.com/od/mo/g/modterm.htm http://www.linguisticsgirl.com/linguistic-definition-of-adjective-phrase-modifier/ https://en.wikipedia.org/wiki/Compound_modifier http://www.merriam-webster.com/dictionary/modifier http://www.thefreedictionary.com/modifier http://study.com/academy/lesson/modifier-examples-definition-quiz.html http://arts.uottawa.ca/writingcentre/en/hypergrammar/modifiers http://grammar.about.com/od/ab/g/adjectivephraseterm.htm http://www.grammar-monster.com/glossary/modifiers_modify.htm
adjectival modifier definition