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