Definify.com
Webster 1913 Edition
Mardi gras
‖
Mar′diˊ gras′
,Noun.
[F., literally, fat Tuesday.]
1.
The last day of Carnival; the Tuesday before Ash Wednesday (the beginning of Lent and fasting); Shrove Tuesday; – in some cities a great day of carnival and merrymaking; in the United States it is especially associated with
New Orleans
.
Syn. – pancake day.