Completely different; facing (8)
I believe the answer is:
opposite
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">completely different</span>' is the first definition.<br/ ><br/ >'<span class="explanation-format__original">facing</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(as in two things facing each other)</span><br/ ><br/ ></span>
(Other definitions for opposite that I've seen before include "Contrary or face-to-face" , "Adverse" , "completely different?" , "Contrary, antipode" , "Corresponding" .)