Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
belowground is an adjective meaning "under the level of the ground". It carries 2 recorded senses.
under the level of the ground
“belowground storage areas”
“underground caverns”
Definitions, synonyms and semantic relations for belowground come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.