What is to be found by experience, trial, or result; to turn out to be; as, a medicine proves salutary; the report proves false. "The case proves mortal." Arbuthnot. So life a winter's morn may prove. Keble called?

prove — To be found by experience, trial, or result; to turn out to be; as, a medicine proves salutary; the report proves false. "The case proves mortal." Arbuthnot. So life a winter's morn may prove. Keble. (Webster's 1913.)