Webster's Dictionary 1828 - Online Edition

Webster's Dictionary 1828

Americal Dictionary of the English Language

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DEMONSTRATE, verb transitive [Latin To show.]

1. To show or prove to be certain; to prove beyond the possibility of doubt; to prove in such a manner as to reduce the contrary position to evident absurdity. We demonstrate a problem in geometry, or a proposition in ethics, by showing that the contrary is absurd or impossible.

2. In anatomy, to exhibit the parts when disected.