sacrificial /ˈsæk.ɹɪ.fɪʃ.əl/ adjective2 •Relating to sacrifice.The old sacrificial well is still there, but animals aren't thrown into it to appease monsters anymore. •Used as a sacrifice.The sacrificial coating protects the hull, but because it takes the damage the hull doesn't, we must replace it annually.The ceremony involves the ritual slaying of a sacrificial lamb.