1The practice or occupation of serving the Church; work or duties carried out for the benefit of the Church.
2Public Christian worship in a church; a celebration of this, especially one following a prescribed form. In the Anglican Church occasionally: specifically the liturgy or form of worship as set out in the Book of Common Prayer.
Late Middle English; earliest use found in Cursor Mundi: a Northumbrian poem of the 14th century. From church + service.