What does "dirige" mean?

Dirige: A service for the dead, in the Roman Catholic Church, being the first antiphon of Matins for the dead, of which Dirige is the first word; a dirge. Evensongs and placebo and dirige. Wyclif. Resort, I pray you, unto my sepulture To sing my dirige with great devotion. Lamentation of Mary Magdalene.

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