This word is about church services: the prayers, the songs, the special clothes, and the set order of what people do in church. If a thing is liturgical, it belongs to that kind of worship, not to ordinary talk. Liturgical music is music for the service, not just any religious song. The liturgical year is the church’s calendar of holy days. The word is a little formal. Priests, pastors, and people who study worship use it a lot. You meet it most with churches that follow a clear pattern, such as Catholic, Orthodox, and some Anglican churches. Churches that keep the service very simple may still have ceremony, but they use this adjective less.