chieflyChristianity, RC Church a priest who hears confessions and sometimes acts as a spiritual counsellor
2.
history a person who bears witness to his Christian religious faith by the holiness of his life, esp in resisting threats or danger, but does not suffer martyrdom
late O.E., "one who avows his religion," especially in the face of danger, but does not suffer martyrdom, from L. confessor, agent noun from confiteri (see confess). Meaning "one who hears confessions" is from 1340; this properly would be L. confessarius, but L. confessor
was being used in this sense from the 9th century. Edward the Confessor (c.1003-1066, canonized 1161), last Anglo-Saxon king, was pious enough but does not seem to fit his title; perhaps so called to distinguish him from another Anglo-Saxon saint/king, Edward the Martyr, who does.