Definitions for "Matins"
Keywords:  morning, psalms, sung, vigil, liturgy
Morning Prayer.
the morning service of the Orthodox Catholic Church, which consists of sung and read troparia, psalms, kanons, stichera, and other hymns, as well as litanies (see also All-Night Vigil)
The morning service of the Church usually celebrated with Vespers as the All-Night Vigil