1. Something attached to another in a dependent or subordinate position. See Synonyms at attachment.
2. A person associated with another in a subordinate or auxiliary capacity.
3. Grammar A clause or phrase added to a sentence that, while not essential to the sentence's structure, amplifies its meaning, such as for several hours in We waited for several hours.
4. Logic A nonessential attribute of a thing.
1. Added or connected in a subordinate or auxiliary capacity: an adjunct clause.
2. Attached to a faculty or staff in a temporary or auxiliary capacity: an adjunct professor of history.
[From Latin adiūnctus, past participle of adiungere, to join to; see ADJOIN.]
ad·junction (ə-jŭngkshən) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.