1. Despite anything to the contrary (usually preceding a concession)
   "Notwithstanding the rain, we decided to go for a walk";
   - however, nevertheless, withal [archaic], still, yet, all the same, even so, nonetheless, at the same time, even if, be that as it may

1. Regardless of, in defiance of
   "went shopping notwithstanding the bad weather";
   - despite, in spite of, in the face of

Encyclopedia: Notwithstanding