1 nevertheless, nonetheless, despite that, in spite of that, yet, anyway:
He was refused permission to go but he left notwithstanding.
2 despite, in spite of, regardless of, in the face of, against:
Notwithstanding his mother's objections, George married Marsha.
3 although, though, even though, despite the fact that:
The product was almost totally unknown, notwithstanding it had been on the market for years.