Propitiation, n.
Etymology: [L. propitiatio: cf. F. propitiation.]
1. The act of appeasing the wrath and conciliating the favor of an offended person; the act of making propitious.
2. (Theol.)
That which propitiates; atonement or atoning sacrifice; specifically, the influence or effects of the death of Christ in appeasing the divine justice, and conciliating the divine favor. He [Jesus Christ] is the propitiation for our sins. 1 John ii. 2.
Shades of meaning
Atonement (at-one-ment), originally denoting reconciliation, or the bringing into agreement of those who have been estranged, is now chiefly used, as in theology, in the sense of some offering, sacrifice, or suffering sufficient to win forgiveness or make up for an offense; especially and distinctively of the sacrificial work of Christ in his humiliation, suffering and death. Expiation is the enduring of the full penalty of a wrong or crime. Propitiation is an offering, action, or sacrifice that makes the governing power propitious toward the offender. Satisfaction in this connection denotes the rendering a full legal equivalent for the wrong done. Propitiation appeases the lawgiver; satisfaction meets the requirements of the law.