/ ˈædʒʌŋkt; NAmE / noun
1.
( grammar ) an adverb or a phrase that adds meaning to the verb in a sentence or part of a sentence :
In 'She went home yesterday' and 'He ran away in a panic', 'yesterday' and 'in a panic' are adjuncts.
2.
( formal ) a thing that is added or attached to sth larger or more important :
The memory expansion cards are useful adjuncts to the computer.
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WORD ORIGIN
early 16th cent.: from Latin adjunctus , past participle of adjungere , from ad- to + jungere to join.