Devoted Thing
Fausset's Bible Dictionary [1]
(Leviticus 27:28). Cherem . Man was not to be offered in sacrifice. Translated, Leviticus 1:2; "if any man of you bring an offering to Jehovah from the beasts, from the herd or from the flock shall ye bring your offering" (compare Exodus 13:13; Exodus 34:20; Numbers 18:15). But certain persons and nations were doomed by God, who alone has the prerogative of taking, as He alone gives, life. Man in carrying out God's clearly revealed sentence is the executioner bound to execute God's will. So magistrates and soldiers (Romans 13:4). So Israel utterly destroyed the Canaanites at Hormah (Numbers 21:2-3; Deuteronomy 13:12-18).
So Samuel hacked Agag in pieces before the Lord (1 Samuel 15:33). Rash vows, as Saul's (1 Samuel 14:24) and Jephthah's (Judges 11:30), are no objection to the soundness of the principle, for here self-will usurps the right of devoting another's life which belongs to God alone. Sacrifices rest on a different ground, namely, the voluntary offering of an innocent life of a creature' without blemish, approved of God to represent the great Substitute. The pagan confounded the two ideas, the devoted thing under ban (as criminals and captives), and the sacrifice of one's flock or herd as a voluntary offering in worship; but Scripture keeps them distinct.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
(See Anathema).
Devotee, "in the primary sense of the word, means a person wholly given up to acts of piety and devotion; but it is usually understood, in a bad sense, to denote a bigot or superstitious person — one addicted to excessive and self-imposed religious exercises." — Buck, Theol. Dictionary, s.v.
