What does adjunct mean?
The definition of adjunct
Ad”junct`, a.
Etym: [L. adjunctus, p. p. of adjungere. See Adjoin.]

Conjoined; attending; consequent. Though that my death were adjunct to my act. Shak. Adjunct notes (Mus.), short notes between those essential to the harmony; auxiliary notes; passing notes.

Ad”junct`, n.
1 Something joined or added to another thing, but not essentially a part of it. Learning is but an adjunct to our self. Shak.
2 A person joined to another in some duty or service; a colleague; an associate. Wotton.
3 (Gram.)
A word or words added to quality or amplify the force of other words; as, the History of the American Revolution, where the words in italics are the adjunct or adjuncts of “History.”
4 (Metaph.)
A quality or property of the body or the mind, whether natural or acquired; as, color, in the body, judgment in the mind.
5 (Mus.)
A key or scale closely related to another as principal; a relative or attendant key. [R.] See Attendant keys, under Attendant, a.