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