propitiation noun2 •The act of propitiating; placation, atonement, similar to expiation but also involving the appeasement of anger.Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God — 1611 •The death of Christ as a basis for the forgiveness of sin. formspropitiations