Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
high-velocity is an adjective meaning "operating at high speed". It carries one recorded sense.
operating at high speed
“a high-speed food processor”
“a high-velocity shell”
Definitions, synonyms and semantic relations for high-velocity come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.