undergroundchamber
nounUK /ˌʌndəˈɡraʊnd ˈtʃeɪmbə/
US /ˌʌndərˈɡraʊnd ˈtʃeɪmbər/
A room that is under the ground.
The explorers found an old underground chamber beneath the castle.
RELATED WORDS
OTHER MEANINGS
2. A hidden room used for secret meetings.
The spies met in an underground chamber to share their plans.
3. A natural hollow space deep in the earth.
Bats slept in the cool underground chamber all day.
4. A storage space dug below the ground.
They kept jars of food in the underground chamber to stay fresh.