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