Imperial Manila noun2 •(Philippines, disapproving) Metro Manila and its surroundings, as generally described in the other provinces in the Philippines.So when it suits this vested interest in Imperial Manila, we liberalize. When it does not suit them because it will compete with their cars, we do not liberalize until 1998. — 1994 •(disapproving) The notion stating that the Philippine government largely imposes its power within Metro Manila and its surroundings, and ignoring the other regions.