Anything that's unconsecrated hasn't been declared to be sacred. Knowing whether something or someone is unconsecrated is important during religious rituals.
In the Christian religious rite of the Eucharist, ordinary unconsecrated bread and wine is made holy. The act of blessing them is called consecration, from the Latin sacrare, or "dedicate." Unconsecrated things have not been dedicated or imbued with holiness. A religious believer might object to a deceased relative's burial in an unconsecrated cemetery.