Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
atheistical is an adjective meaning "related to or characterized by or given to atheism". It carries 2 recorded senses.
rejecting any belief in gods
Definitions, synonyms and semantic relations for atheistical come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.