Overview
Consecration is the transfer of a person or a thing to the sacred sphere for a special purpose or service. The word consecration literally means "association with the sacred". Persons, places, or things can be consecrated, and the term is used in various ways by different groups. The origin of the word comes from the Latin stem consecrat, which means dedicated, devoted, and sacred. A synonym for consecration is sanctification; its antonym is desecration.
Christianity
In Christianity, consecration means "setting apart" a person, as well as a building or object, for God. Among some Christian denominations there is a complementary service of "deconsecration", to remove a consecrated place of its sacred character in preparation for either demolition or sale for secular use.
Catholic Church
From Wikipedia (CC BY-SA 4.0).