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

• 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

Stein’s bedroom adjoined the room where Dodge would visit her lover at night; kept awake by the murmurings and moans, Stein lit a candle and composed a portrait of her host. —Via Scribner, Literary Hub, 7 Oct. 2025

Worden was found dead later that night in a woodshed adjoining Gein's house, hanging from her heels. —Jessica Sager, PEOPLE, 6 Oct. 2025

The new department will be located in what was previously Children's Wisconsin's emergency department, where the two hospitals are adjoined. —Sarah Volpenhein, jsonline.com, 3 Oct. 2025

Her son, later identified as now 30-year-old Martin Caballero-Diaz, was found in the bathroom at the front adjoining home and detained, officials said. —Paloma Chavez, Sacbee.com, 3 Oct. 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