Noun mardi gras has 2 senses
  1. Mardi Gras, Shrove Tuesday, pancake day - the last day before Lent
    --1 is a kind of Christian holy day
    --1 is a part of Shrovetide
  2. Mardi Gras, Fat Tuesday - the pre-Lenten festival of Shrove Tuesday
    --2 is a kind of carnival
    --2 is a part of New Orleans
,
TOP