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

The two beds can also be adjoined into a single double bed with an optional kit. —New Atlas, 19 Feb. 2026

When first responders arrived, heavy smoke filled the air and flames were observed in the front corner window of the first floor of a 16-unit apartment building which is adjoined to two other apartment buildings. —Erik S. Hanley, jsonline.com, 17 Feb. 2026

Accessibility Massive Caesars does accessibility right with ramps adjoining its various levels, accessible guest rooms with lots of space for power wheelchairs, and moveable chairs at slots machines and table games. —Andrea Bennett, Condé Nast Traveler, 10 Feb. 2026

Further, nearby Walmart, Stop & Shop supermarket, Comfort Inn, and adjoining Motel 6 drive consistent traffic to the area, according to Marcus & Millichap. —Staff Report, Hartford Courant, 7 Feb. 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