adjoin

verb

ad·​join ə-ˈjȯin 

a-

adjoined; adjoining; adjoins

transitive verb

1

: to add or attach by joining

2

: to lie next to or in contact with

intransitive verb

: to be close to or in contact with one another

Synonyms of adjoin

• join
• flank
• surround
• neighbor
• touch

Examples of adjoin in a Sentence

Her office adjoins the library.

The two rooms adjoin each other.

Recent Examples on the Web

Here, a marble island anchors the cooking space, which adjoins a more casual dining area and the family room. —Tori Latham, Robb Report, 13 Dec. 2025

An impressive fitness center adjoins the spa. —Susan Barnes, Southern Living, 10 Dec. 2025

Our 25,000 square-foot expansion, adjoining our longtime home in the Historic Shorter African Methodist Episcopal Church (100 years old in 2026), is not just a beautiful edifice. —Malik Robinson, Denver Post, 7 Dec. 2025

The Railroader Printing House adjoins the Park Square Court building, which was once slated by Madison Equities to be converted into apartments or a Marriott hotel. —Frederick Melo, Twin Cities, 5 Dec. 2025

Word History

Etymology

Middle English ajoynen, adjoynen, borrowed from Anglo-French ajoindre, going back to Latin adjungere "to link up, yoke, add, attach," from ad- ad- + jungere "to join entry 1"

First Known Use

14th century, in the meaning defined at transitive sense 1

Rhymes for adjoin

• benzoin
• bitcoin
• conjoin
• enjoin
• fibroin
• rejoin
• sirloin
• subjoin
• coin
• coyne
• groin
• join

Kids Definition

adjoin

verb

ad·​join ə-ˈjȯin 

a-

1

: to add or attach by joining

2

: to lie next to or in contact with