Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
housefly is a noun meaning "common fly that frequents human habitations and spreads many diseases". It carries one recorded sense.
common fly that frequents human habitations and spreads many diseases
Forms marked are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for housefly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.