Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
nonmusical is an adjective meaning "lacking interest in or talent for music". It carries 2 recorded senses.
lacking interest in or talent for music
“too unmusical to care for concerts”
“it is unfortunate that her children were all nonmusical”
Definitions, synonyms and semantic relations for nonmusical come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.