demonstrate

Verb

Synonyms: show demo exhibit present prove establish shew attest certify manifest evidence march

WordNet 3.0

Verb (4)

give an exhibition of to an interested audience“She shows her dogs frequently”“We will demo the new software in Washington”Synonyms: show demo exhibit present
establish the validity of something, as by an example, explanation or experiment“The experiment demonstrated the instability of the compound”“The mathematician showed the validity of the conjecture”Synonyms: prove establish show shew
provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes“His high fever attested to his illness”“The buildings in Rome manifest a high level of architectural sophistication”“This decision demonstrates his sense of fairness”Synonyms: attest certify manifest evidence
march in protest; take part in a demonstration“Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle”Synonyms: march

Webster's Dictionary (GCIDE)

Demonstrate \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. [1913 Webster]

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. [1913 Webster]

We can not demonstrate these things so as to show that the contrary often involves a contradiction.— Tillotson.[1913 Webster]

3.(Anat.) To exhibit and explain (a dissection or other anatomical preparation). [1913 Webster]