CASUALTY Meaning of CASUALTY in English noun 1.Synonyms: accident 2, misadventure, mischance, mishap 2.Synonyms: fatality 2, death, fatal 3.Synonyms: victim 2, bottom dog, prey, underdog Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003