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. See Attendant keys, under Attendant, a.