v. establish the validity of something, as by an example, explanation or experiment; "The experiment demonstrated the instability of the compound"; "The mathematician showed the validity of the conjecture"

v. prove formally; demonstrate by a mathematical, formal proof

v. obtain probate of; "prove a will"

v. take a trial impression of

v. cause to puff up with a leaven; "unleavened bread"

v. increase in volume; "the dough rose slowly in the warm room"

v. put to the test, as for its quality, or give experimental use to; "This approach has been tried with good results"; "Test this recipe"

v. be shown or be found to be; "She proved to be right"; "The medicine turned out to save her life"; "She turned up HIV positive"