What does 'vicarious suffering' mean in the context of Isaiah 53?

'Vicarious suffering' in Isaiah 53 refers to the concept that Jesus Christ bore the judgment for sin on behalf of His people. He was afflicted not for His own transgressions but for ours. This idea is central to Reformed theology, where it is believed that Christ willingly took upon Himself the sins of those whom God foreknew and designated for salvation. Thus, His suffering is seen as a specific fulfillment of God's covenant promise, providing a way for believers to be justified before Him.