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