demonstrable

UK: /dɪˈmɒnstrəb^əl/, /ˈdɛmənstrəb^əl/

US: /dɪˈmɑnstrəbəl/

US: (di mon′strə bəl, dem′ən-)

WordReference Random House Learner's Dictionary of American English © 2025

de•mon•stra•ble /dɪˈmɑnstrəbəl/   adj. 

1. capable of being demonstrated:
   a demonstrable lie.

de•mon•stra•bly, adv.: 

a demonstrably false argument.

WordReference Random House Unabridged Dictionary of American English © 2025

de•mon•stra•ble  (di mon′strə bəl, dem′ən-), adj. 

1. capable of being demonstrated or proved.
2. clearly evident;
   obvious:
   a demonstrable lack of concern for the general welfare.

• Late Latin dēmonstrābilis, equivalent. to Latin dēmonstrā(re) (see demonstrate) + -bilis -ble
• Old French
• Middle English 1350–1400

de•mon′stra•bil′i•ty, de•mon′stra•ble•ness, n. 
de•mon′stra•bly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

demonstrable / ˈdɛmənstrəb^əl dɪˈmɒn-/ adjective

1. able to be demonstrated or proved

ˌdemonstraˈbility, ˈdemonstrableness noun

demonstrably / ˈdɛmənstrəblɪ dɪˈmɒn-/ adverb