among philosophers, signifies something added to another, without being any necessary part of it. Thus water absorbed by cloth or a sponge, is an adjunct, but no necessary part of either of these substances.

metaphysics, some quality belonging to either the body or mind, whether natural or acquired. Thus thinking is an adjunct of the mind, and growth an adjunct of the body.

music, a word which is employed to denote the connection or relation between the principal mode and the modes of its two fifths, which, from the intervals that constitute the relation between them and it, are called its adjuncts.

Adjunct is also used to signify a colleague, or some person associated with another as an assistant.