adjacentroom
nounUK /əˈdʒeɪsənt ruːm/
US /əˈdʒeɪsənt rum/
A room that is right next to another room.
The children slept in the adjacentroom to their parents.
OTHER MEANINGS
2. A room sharing a common wall with another room.
The hotel gave us an adjacentroom with a shared wall.
3. A room connected by a door to another room.
The adjacentroom had a door leading into the main bedroom.
4. A room located immediately beside a meeting or event space.
Guests gathered in the adjacentroom before the ceremony.