Adjunct means something added on, but not part of the whole. An adjunct professor is someone who is hired by a college to teach but isn't a full member of the faculty.

This is a word you can figure out by taking it apart. From ad- "to" and -junct "join" (think "junction"), you can see that this is about joining something to another. "During lunch, Tim always sat at the girls' lacrosse-team lunch table, and they joked that he was an adjunct member of the team."

Definitions of adjunct

n something added to another thing but not an essential part of it

accompaniment, complement
something added to complete or embellish or make perfect
Type of:
inessential, nonessential
anything that is not essential

n a person who is an assistant or subordinate to another

Type of:
a person who joins with others in some activity or endeavor

n 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

parenthetical, parenthetical expression
an expression in parentheses
Type of:
construction, expression, grammatical construction
a group of words that form a constituent of a sentence and are considered as a single unit

adj furnishing added support

accessory, adjuvant, ancillary, appurtenant, auxiliary
furnishing support or assistance

adj of or relating to a person who is subordinate to another

low-level, subordinate
lower in rank or importance

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