"Krishna means Jagannatha. Jagat. Jagat means this world, and natha means master, or proprietor. So Krishna says in the Bhagavad-gita, bhoktaram yajna-tapasam sarva-loka-mahesvaram: 'I am the proprietor of all the planets.' Therefore He is Jagannatha. Jagannatha means the proprietor of all the world, all the planets."
(Srila Prabhupada press conference, San Francisco, July 4, 1970)
*Many thanks to Gary Paterson for sharing his wonderful photograph of Lord Jagannatha.