Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: ChronologyMardi GrasMar‧di Gras /ˌmɑːdi ˈɡrɑː $ ˈmɑːrdi ɡrɑː/ noun [uncountable] TMCthe day before Lent begins, or the music, dancing etc that happen on this day in some countriesOrigin Mardi Gras (1600-1700) French “fat Tuesday” ldoceonline.com