de ‧ mon ‧ stra ‧ ble AC /dɪˈmɒnstrəb ə l, ˈdemən- $ dɪˈmɑːn-/ BrE AmE adjective formal
[ Word Family: noun : ↑ demonstration , ↑ demonstrator ; adverb : ↑ demonstrably , ↑ demonstratively ; adjective : ↑ demonstrable , ↑ demonstrative ; verb : ↑ demonstrate ]
able to be shown or proved:
We must provide demonstrable improvements in health services.
—demonstrably adverb :
These conclusions are demonstrably wrong.