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

Nearby, a dining area topped with a Noguchi light fixture adjoins a sleek matte black and brass-accented kitchen, which has an expansive island that seats five, integrated appliances, and a walk-in pantry. — Wendy Bowman, Robb Report, 20 Aug. 2026

Undeterred, the three friends bought the hotel and adjoining property for $3 million and have since spent over $10 million on renovations and redesign. — Madeleine Kashkooli, San Diego Union-Tribune, 14 Aug. 2026

The film could use a few more such colorful secondary strands adjoining the main conflict, though one subplot involving a maybe-romance between two jaded journalists assigned to the summit is oddly framed and abruptly dropped. — Guy Lodge, Variety, 12 Aug. 2026

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, 9 Aug. 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
• rejoin
• sirloin
• subjoin
• coin
• coyne
• groin
• join
• koine

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