"[T]he two types of construction, attributive modification and (inalienable) possession, share the property of being noun-headed but are otherwise different in type. This difference is generally reflected in the morphosyntax of the constructions. Attributive modification is normally expressed by a dedicated lexical class of adjectives whose members may show special morphosyntax, specifically agreement in features such as gender, number, or case."
(Irina Nikolaeva and Andrew Spencer, "Possession and Modification--A Perspective From Canonical Typology." Canonical Morphology and Syntax, ed. by Dunstan Brown, Marina Chumakina, and Greville G. Corbett. Oxford University Press, 2013) "The term [modification] is also used in morphology to refer to a process of change within the root or stem of a form, as in the vowel changes between the singular and plural of some nouns in English (man ~ men), or in cases of suppletion. In this, and related senses, the term is also found in historical linguistics.
"In phonetics, factors which influence the airflow in the vocal tract are often referred to as modificatons, e.g. the movement of the soft palate, the degree of closure of the glottis. The term is also sometimes used to refer to any factors which alter the typical actions of the vocal organs in producing the phonemes of a language, as in prosodic features, secondary articulations, and transitions between sounds."
(David Crystal, A Dictionary of Linguistics and Phonetics, 4th ed. Blackwell, 1997) Product Showcase Video. Human Body FAQs