Definition of "Jah"

Jah

proper noun
1. (religion) A shortened form of Yahweh or Jehovah, God's personal name in the Bible. Often appearing as part of Biblical names as "-iah", or "Jeho-" as in Isaiah, Jeremiah, Jehoshua, and Jehosaphat, and Hebrew words like הַלְּלוּיָהּ (“hallelujah”).
2. (Rastafari) God.
  Quotations
  So [...] he say a prayer of thanks because Jah know.
  2022, Ayanna Lloyd Banwo, When We Were Birds, Hamish Hamilton, page 13