demonstrate demonstrate /ˈdɛmənˌstreɪt/

verb

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