Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unsensational is an adjective meaning "not of such character as to arouse intense interest, curiosity, or emotional reaction". It carries one recorded sense.
not of such character as to arouse intense interest, curiosity, or emotional reaction
Definitions, synonyms and semantic relations for unsensational come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.