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