It is a term that originated in Christianity, although now it is often used in non-religious contexts. The idea of vocation is central to the Christian belief that God has created each person with gifts and talents oriented toward specific purposes and a way of life.
In the Catechism of the Catholic Church we read about vocation in the broadest sense:
Love is the fundamental and innate vocation of every human being. (CCC 2392)
This divine call to service to the Church and humanity is lived through particular vocational life commitments such as marriage, consecration as a religious, a holy life as a single person, and ordination to priestly ministry in the Church. A Christian vocation includes the use of one’s gifts in their profession, family life, church and civic commitments for the sake of the greater common good.