Source : Webster's Revised Unabridged Dictionary (1913)

Maundy Thursday \Maun"dy Thurs"day\ [OE. maunde a command, OF.
   mand['e], L. mandatum, from mandare to command. See called
   from the ancient custom of washing the feet of the poor on
   this day, which was taken to be the fulfillment of the ``new
   commandment,'' --John xiii. 5, 34.] (Eccl.)
   The Thursday in Passion week, or next before Good Friday.

Source : WordNet®

Maundy Thursday
     n : the Thursday before Easter; commemorates the Last Supper
         [syn: {Holy Thursday}]