1. To point out; to show; to exhibit; to make evident.
2. To show, or make evident, by reasoning or proof; to prove by deduction; to establish so as to exclude the possibility of doubt or denial. We can not demonstrate these things so as to show that the contrary often involves a contradiction. (Tillotson)
3. (Science: anatomy) to exhibit and explain (a dissection or other anatomical preparation).
Origin: L. Demonstratus, p. P. Of demonstrare to demonstrate; de- – monstrare to show. See monster.