Hebrew, “zevah shelamim.” One of the sacrifices and offerings required by God before the coming of Jesus in the flesh. There are three types of peace-offerings: the thank-offering, the votive-offering given in fulfillment of a vow, and the free-will offering.
The thank-offering was given in response to blessing or acts of divine favor. The votive offering was given at the fulfilment of a petition. The free-will sacrifice was given when one was moved by the Holy Spirit as a spontaneous show of piety. Today one would take the Sacrament of Communion and give offerings or to charitable causes.
See 4 Moses 28, Leviticus 3; 7.11–34.