Simple past tense and past participle of prove.(verb)
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Use "proved" in a sentence
""Whereas Belgium, having refused to accept the proposals made to her on several occasions by Germany, is affording her military assistance to France and Great Britain, both of which Powers have declared war upon Austria-Hungary, and whereas, as has just been proved (_no indication as to how or when it has been proved_),"
"The term proved to be crucial for the diagnosis and treatment of minds and bodies of people."
"The only thing Hillary's PA squeeky win proved is that there are a lot of racist, old, uneducated morons in that state."