Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Illness & disabilitygrand malgrand mal /ˌɡrɒn ˈmæl $ ˌɡrɑːn-/ noun [uncountable] technical MIa serious form of epilepsy → petit malOrigin grand mal (1800-1900) French “great illness” ldoceonline.com