1
general::
1. Up in the sky; also, in heaven. For example, They fixed their eyes on high, looking for the comet, or, in the Bible (Psalms 63:5), "The Lord our God who dwelleth on high." [c. 1200] 2. In a position of authority, as in Those on high have decreed that we work every other weekend. This usage is an ironic transfer from def. 1. Also see POWERS THAT BE.
American Heritage Idioms