Search Dictionary
Definition of adjoin

adjoin

/əˈdʒɔɪn/
ad · join

Adjective:adjoining
•
Past Simple:adjoined
•
Past Participle:adjoined
•
Present Participle:adjoining
JUMP TO:

adjoin Lexical Profile

adjoin Game Scores & Validity

• verb

1

To be next to and joined with a building, room, or piece of land, sharing a common boundary or wall.

Example

"The botanical conservatory adjoins the main natural history museum on its eastern side."


2

To attach, add, or append an element to a mathematical set, algebraic structure, or formal document.

Example

"To solve the polynomial equation, the mathematician chose to adjoin a new root to the base field."

Synonyms
View all synonyms for adjoin
Antonyms
View all antonyms for adjoin

Word Nuance & Usage

Do not confuse 'adjoin' with 'adjourn': 'adjoin' means to be next to or share a common boundary with something, whereas 'adjourn' means to suspend or postpone a meeting or legal proceeding.

• Rhymes for adjoin

Word Origin & Etymology

Borrowed into Middle English from Old French ajoindre, which derives from Latin adiungere ('to join to, attach'), formed from the prefix ad- ('to') and iungere ('to join, yoke').

Cite this Entry


Wordmom. (2026). Definition of Adjoin. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/adjoin
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.