Modifier (i.e. dependent)

In syntax, the term modifier was sometimes used in the sense of dependent for an element which is neither an argument nor a predicate, but which modifies another element or phrase (e.g. a predicate).

Comments
This usage is found, for example, in Fries (1952:202ff.) and Hawkins (1983). It is becoming obsolete.

Example
the adverb very is a modifier of the adjective ill in he is very ill.

Links
Utrecht Lexicon of Linguistics