conclusively

adv

1. In a conclusive manner; with finality; decisively.

   “Once the final experiment had been performed, the theory was conclusively proved.”

   “I need not extend the subject any farther; enough has been said , and much more might be, if necessary, to prove clearly and conclusively that the odontotechny of the Greeks and Romans was advanced to a considerable degree of perfection: […]”

   “[…] which conclusively prove the enormous superiority of the Sumerian over the Egyptian weaponsmithy.”

2. By way of conclusion.

   “"Go and find out who did it, before you come blaming me for it." "It's only youse crowd wot comes makin' a pigsty of the place," said Melons conclusively. "It ain't the second nor third floors wot comes makin' all manner o' mess in these basins."”