Verb
1. show or demonstrate something to an interested audience;
"She shows her dogs frequently""We will demo the new software in Washington"2. 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"3. 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"4. march in protest; take part in a demonstration;
"Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle"