Pronunciation IPA (key): /əˈtrɑsəti/ Audio (US)(file) Hyphenation: atroc‧i‧ty Noun Singular atrocity Plural atrocities (countable) An atrocity is a very cruel, brutal, and sometimes criminal actions.Antonym: kindness Related words atrociousWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads