vacant

adj

1. Not occupied; empty.

   “a vacant room”

   “a vacant consulate”

   “Below and to rearward circles the Tweed, silver grey on a dark brown field. Beside its low banks no tourists linger, vacant hangs the quivering bridge; down the narrow lanes no carriages come pressing over a succession of waving hills[…]”

2. (rare)Not present; absent.

   “And Pierre felt that never, never would he be able to embrace Isabel with the mere brotherly embrace; while the thought of any other caress, which took hold of any domesticness, was entirely vacant from his uncontaminated soul, for it had never consciously intruded there.”

3. Blank.

   “a vacant page”

4. Showing no intelligence or interest.

   “a vacant stare”

   “a vacant look in her eyes”

   “Fortunately the Reagan administration proved you can have a vacant moron as President and nothing really that bad will happen because the government isn't actually run by one person...the Executive office isn't even really run by the President alone.”