American Dictionary of the English Language

PROPITIATION, noun propisia'shon.

1. The act of appeasing wrath and conciliating the favor of an offended person; the act of making propitious.

2. In theology, the atonement or atoning sacrifice offered to God to assuage his wrath and render him propitious to sinners. Christ is the propitiation for the sins of men. Romans 3:25. 1 John 2:2.