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

Flay lives in the Morris Adjmic–designed Sterling Mason, a condominium composed of a 1905 red brick warehouse adjoined with a newer, metallic mirror image. —Keith Flanagan, Architectural Digest, 2 Sep. 2025

The Empress Tavern, the basement-level restaurant adjoining the theater which shut down during the pandemic, reopened this spring for private events and concerts hosted by a local nonprofit. —Sacbee.com, 30 Aug. 2025

Grab Afternoon Tea Stop into Heritage Bakery & Cafe, a cozy spot that adjoins Harrisonburg's welcome center, to delight in whimsical refreshments served on delicate china. —Tara Massouleh McCay, Southern Living, 24 Aug. 2025

By 1938, the Netherlands had a 1,170-mile main-road network, 866 miles of which had adjoining cycleways. —Carlton Reid, Forbes.com, 12 Aug. 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