Definition of "prove" []

• To establish the truth or validity of by presentation of argument or evidence. (verb-transitive)
• Law To establish the authenticity of (a will). (verb-transitive)
• To determine the quality of by testing; try out. (verb-transitive)
• Mathematics To demonstrate the validity of (a hypothesis or proposition). (verb-transitive)
• Mathematics To verify (the result of a calculation). (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "They write letters to prove that they "don't count," and they _prove it_. '"
• "It is said of kings and rulers, they must prove that they have a heart, and it may also be said of the man who has no religion, that _he must prove_ that he has a _conscience."
• "The word prove is usually reserved for mathematics: “to verify the correctness or validity of by mathematical demonstration or arithmetical proof” Random House Unabridged Dictionary."