Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
chock-a-block is an adverb meaning "as completely as possible". It carries one recorded sense.
Definitions, synonyms and semantic relations for chock-a-block come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.