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

Each cabin showcases a unique colorway, custom finishes, and adjoining en suites with marble detailing. — Rachel Cormack, Robb Report, 23 July 2026

Then, another 20-year-old man, Daktari Rose Deacon, of Hyde Park, left a bathroom that adjoined the bedroom, according to police, who searched the bathroom and found another loaded firearm with an extended magazine. — Colleen Cronin, Boston Herald, 20 July 2026

Two double bedrooms and a single bedroom are tucked at the end of the main floor, and are adjoined by a large outdoor terrace. — Bridget Borgobello july 03, New Atlas, 4 July 2026

Flossmoor’s South Commuter Lot, which adjoins the village’s Metra station just steps from downtown, may be reimagined as a public park and community gathering space with the help of an Illinois Department of Natural Resources grant. — Evy Lewis, Chicago Tribune, 25 June 2026

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
• rejoin
• sirloin
• subjoin
• coin
• coyne
• groin
• join
• koine

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