peace offering

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An offering made to an adversary in the interests of peace or reconciliation.

from The Century Dictionary.

• noun An offering that procures peace, reconciliation, or satisfaction; satisfaction offered to an offended person, especially to a superior.
• noun Specifically, an offering prescribed under the Levitical law as an expression of thanksgiving.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A religious sacrifice in both Jewish,Christian, and Islamic traditions.
• noun An offering made to an adversary in the hope of obtaining peace or reconciliation; an olive branch.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun something offered to an adversary in the hope of obtaining peace