'Demonstrably' definitions:

Definition of 'demonstrably'

(from WordNet)
adverb
In an obvious and provable manner; "his documentary sources are demonstrably wrong" [syn: demonstrably, provably, incontrovertibly]

Definition of 'Demonstrably'

From: GCIDE
  • Demonstrably \De*mon"stra*bly\, adv. In a demonstrable manner; incontrovertibly; clearly. [1913 Webster]
  • Cases that demonstrably concerned the public cause. --Clarendon. [1913 Webster]