Tenebrae

[Sarah]

The matins and lauds for the last three days of Holy Week,commemorating the sufferings and death of Christ, -- usually sung onthe afternoon or evening of Wednesday, Thursday, and Friday, insteadof on the following days.

[Sarah]

A contemporary usage of the Latin word for darkness, the word tenebrae is often used to express a concealed or open darkness to an item or person.

[Little_Girl]

(in the Roman Catholic Church) matins and lauds for the last three days of Holy Week, at which candles are successively extinguished. Several composers have set parts of the office to music.