Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
pitch-dark is an adjective meaning "extremely dark". It carries one recorded sense.
extremely dark
“a black moonless night”
“through the pitch-black woods”
“it was pitch-dark in the cellar”
Definitions, synonyms and semantic relations for pitch-dark come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.