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

Though the properties cannot be structurally adjoined, the 500-square-foot studio serves as ideal guest quarters or office space next to the primary 3,000-square-foot loft. —Wendy Bowman, Robb Report, 8 June 2026

Several suites are in the mix, including a Palace Roof Suite with swoon-worthy scenery from its waterfront terrace and a Bosphorus Palace Suite that can connect to adjoining rooms to create a three-bedroom royal residence. —Condé Nast, Condé Nast Traveler, 2 June 2026

Rowbottom and Lindsey work side by side from adjoining desks in their lofted home office, a French bulldog named Jammy snoring between them. —Mariella Rudi, Los Angeles Times, 1 June 2026

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

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