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