adjoining room
nounUK /əˈdʒɔɪ.nɪŋ ruːm/
US /əˈdʒɔɪ.nɪŋ rum/
A room that is right next to another room.
We booked an adjoining room so the kids could sleep close by.
OTHER MEANINGS
2. A hotel room connected to another by a private door.
The family reserved two adjoining rooms for the weekend.
3. A room sharing a wall with another room.
The adjoining room was quiet all night.
4. A room attached to a main hall or building.
The meeting was held in the adjoining room.