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

• abut
• border (on)
• butt (on or against)
• flank
• fringe
• join
• march (with)
• neighbor
• skirt
• touch
• verge (on)

Examples of adjoin in a Sentence

Her office adjoins the library.

The two rooms adjoin each other.

Recent Examples on the Web

The amphitheater, adjoining hotel tower and the Mattel Adventure Park are expected to debut by the end of next year, and the rest of the project is slated to open in 2026. —Jessica Boehm, Axios, 17 Oct. 2024

For centuries, the mosque adjoined temples and monasteries associated with the legendary Hindu divine king Rama. —Supriya Gandhi, Foreign Affairs, 13 July 2020

One important note: Four zones adjoining the race course allow spectator boats. —Jemima Sissons, Robb Report, 14 Aug. 2024

One he’s visibly enhanced … through a path and a way on display in his sanctum adjoining the cathedral. —Vahe Gregorian, Kansas City Star, 2 July 2024

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

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