1. Having been demonstrated or verified beyond doubt
   "The demonstrated effectiveness of the vaccine led to its widespread adoption"

1. Make clear the validity of something, as by an example, explanation or experiment
   "The experiment demonstrated the instability of the compound";
   - prove, establish, show, shew [Brit, archaic]
    
2. Give an exhibition of to an interested audience
   "The inventor demonstrated his new device";
   - show, demo, exhibit, present, showcase
    
3. Provide clear proof or evidence of something through actions, behaviour, or observable qualities
   "This decision demonstrates his sense of fairness";
   - attest, manifest, evidence
    
4. March in protest; take part in a demonstration
   "Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle";
   - march

See also: incontestable, incontestible

Type of: affirm, bear witness, confirm, corroborate, dissent, evidence, protest, prove, resist, show, substantiate, support, sustain, testify, witness

Encyclopedia: Demonstrated