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

Extend a small bedroom When confronted with a room adjoining a small patio space, try combining them! —Rachel Davies, Architectural Digest, 15 Apr. 2026

Among the bottles on Avra Madison’s list is Anseillan, a wine from the estate adjoining Château Lafite Rothschild, which is owned by DBR Lafite and is made by the same team. —Mike Desimone, Robb Report, 12 Apr. 2026

The rest hail from all over, and while the city’s cultural pull makes leisure guests the large majority, the huge gardens and event spaces like the Conventino, a deconsecrated 19th century church adjoining Palazzo del Nero, mean that the hotel is a popular venue too for social and corporate events. —Condé Nast, Condé Nast Traveler, 11 Apr. 2026

Julian lords over not one but two swanky adjoining townhouses stuffed with antiques. —Amy Nicholson, Los Angeles Times, 9 Apr. 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
• 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