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