Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
vent-hole is a noun meaning "a hole for the escape of gas or air". It carries one recorded sense.
a hole for the escape of gas or air
Definitions, synonyms and semantic relations for vent-hole come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.