De*mon"stra*ble*ness, n. The quality of being demonstrable; demonstrability.
De*mon"stra*bly, adv. In a demonstrable manner; incontrovertibly; clearly.
Cases that demonstrably concerned the public cause.
Clarendon.
De*mon"strance (?), n. [OF. demonstrance.] Demonstration; proof. [Obs.] Holland.
Dem"on*strate (?; 277), v. t. [L. demonstratus, p. p. of demonstrare to demonstrate; de- + monstrare to show. See Monster.] 1. To point out; to show; to exhibit; to make evident. Shak.
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. (Anat.) To exhibit and explain (a dissection or other anatomical preparation).
Dem"on*stra`ter, n. See Demonstrator.
Dem`on*stra"tion (?), n. [L. demonstratio: cf. F. démonstration.] 1. The act of demonstrating; an exhibition; proof; especially, proof beyond the possibility of doubt; indubitable evidence, to the senses or reason.
Those intervening ideas which serve to show the agreement of any two others are called "proofs;" and where agreement or disagreement is by this means plainly and clearly perceived, it is called demonstration.
Locke.