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