Definitions for "Maundy Thursday"
The Thursday in Passion week, or next before Good Friday.
Thursday in Holy Week which commemorates the institution of the Lord's Supper or Holy Communion. Foot washing may also be reenacted on Maundy Thursday.
Thursday in Holy Week (see BCP, 274); the name is from Latin `mandatum' referring to Christ's commandment concerning foot-washing; also the day on which the first Lord's Supper was celebrated.