New Defender's Study Bible Notes
47:1 clap your hands. In modern usage, hand-clapping has come to mean simply applause for a performance. In Biblical usage, on the other hand, it was symbolic of triumph. The various Hebrew words for “clap” are also translated “smite,” “strike,” “thrust,” etc.
47:2 King over all the earth. The fulfillment of the promises of this psalm applies primarily to the future, when Christ will indeed reign physically over all the earth and Israel will finally occupy her place as the center of His kingdom (Isaiah 2:2-4; Zechariah 14:9).
47:8 over the heathen. The promise of God the Father to God the Son (Psalm 2:7-9) will be fulfilled in this coming age of Christ’s kingdom rule on this earth. See notes on Revelation 20:2-4.