Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
air-to-ground is an adjective meaning "operating from or designed to be fired from aircraft at targets on the ground". It carries one recorded sense.
operating from or designed to be fired from aircraft at targets on the ground
“air-to-surface missiles”
Definitions, synonyms and semantic relations for air-to-ground come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.