ash wednesday Meaning, Definition & Usage
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noun the 7th Wednesday before Easter; the first day of Lent; the day following Mardi Gras (`Fat Tuesday'); a day of fasting and repentance
WordNet
Ash` Wednes"day
Definitions
The first day of Lent; -- so called from a custom in the Roman Catholic church of putting ashes, on that day, upon the foreheads of penitents.