To fly, to move through the air. Used in Revelation of an eagle (or angel) flying in midheaven, proclaiming God's messages.
In Revelation, an eagle 'flying in midair' cries out triple woe to the inhabitants of the earth (Revelation 8:13). Angels also 'fly' in midheaven proclaiming the eternal gospel (Revelation 14:6). God's final messages are delivered with urgency and speed — flying, not walking — because time is short.