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

Born in Knoxville, Tennessee, Henson moved to metro Atlanta as a toddler and grew up in Paulding County, with strong ties to adjoining Douglas County. —Nancy Badertscher, AJC.com, 7 May 2026

Investigators say the hiker became stranded after getting lost in the Sampson Mountain Wilderness section of Cherokee National Forest, which adjoins national forests in Virginia, North Carolina, and Georgia. —Mark Price, Charlotte Observer, 7 May 2026

In addition to adjoining Oak Forest, the property is also close to Midlothian, Markham, Tinley Park and Country Club Hills. —Evy Lewis, Chicago Tribune, 27 Apr. 2026

This pedestrian and bike bridge from the River Market to the Riverfront will adjoin the streetcar’s riverfront extension tracks. —Eleanor Nash, Kansas City Star, 20 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