To make or declare something sacred, typically by a religious ceremony. The bishop will consecrate the new church next Sunday.
To dedicate formally to a religious or divine purpose. They decided to consecrate their lives to serving the community.
To ordain someone to a sacred office, typically that of a bishop. The priest was consecrated as a bishop in a solemn ceremony.
(Christianity) To change bread and wine into the body and blood of Christ during the celebration of the Eucharist. During Mass, the priest will consecrate the bread and wine.