Dictionary definition · adjunct
noun
- something added to another thing but not an essential part of it
- a person who is an assistant or subordinate to another
- a construction that can be used to extend the meaning of a word or phrase but is not one of the main constituents of a sentence
adjective
- furnishing added support"an ancillary pump"
- of or relating to a person who is subordinate to another
Source: Open English WordNet (CC BY 4.0).