PROVE
verb. (-ving; past part. Proved or proven) 1 (often foll. By that) demonstrate the truth of by evidence or argument. 2 a (usually. Foll. By to + infin.) Be found (it proved to be untrue). B emerge as (will prove the winner). 3 test the accuracy of (a calculation). 4 establish the validity of (a will). 5 (of dough) rise in bread-making. ? not proven (in scottish law) verdict that there is insufficient evidence to establish guilt or innocence. Prove oneself show one`s abilities, courage, etc. ? provable adjective. [latin probo test, approve] usage the use of proven as the past participle is uncommon except in certain expressions, such as of proven ability. It is, however, standard in scots and american english.