belowground
adverb or adjective
be·low·ground bi-ˌlō-ˈgrau̇nd 
bi-ˈlō-ˌgrau̇nd
: beneath the surface of the earth
Synonyms
- subsurface
- subterranean
- underground
See all Synonyms & Antonyms 
Example Sentences
Recent Examples on the Web Explore Edinburgh’s historic alleyways Layers upon layers of history mean visitors must head belowground to see Edinburgh’s only preserved, 17th-century street. 
Meghan Miner Murray, National Geographic, 2 Aug. 2019
Meghan Miner Murray, National Geographic, 2 Aug. 2019 Word History
First Known Use
1617, in the meaning defined above
belowground
adjective
as in underground
being, situated, or operating beneath the surface of the earth a vast belowground network of tunnels Synonyms & Similar Words
Relevance
- underground
- subterranean
- subsurface
Antonyms & Near Antonyms
- surface
- aboveground