Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unpremeditated is an adjective meaning "not prepared or planned in advance". It carries 2 recorded senses.
not premeditated
Definitions, synonyms and semantic relations for unpremeditated come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.