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

The original hotel was upgraded from a four star property to a five star a few years ago including the adjoining gym and restaurants spaces. —Alissa Fitzgerald, Forbes.com, 25 June 2025

Chesterton has started a $4 million remodeling project for the Town Hall and adjoining fire station at 8th Street and Broadway. —Jim Woods, Chicago Tribune, 4 June 2025

The concert venue that adjoins the Panthers’ new practice facility in Holiday Park will open at 6:30 p.m., with live music, giveaways, food and drink available before the 8 p.m. game. —Ben Crandell, Sun Sentinel, 22 May 2025

But all this development has often meant that riparian borders (in this case, the wooded land adjoining the river), which can slow a flood down, have been fragmented. —John Seabrook, New Yorker, 21 July 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