demonstration >> /ˌdɛmənˈstreɪʃ(ə)n/
Definition: [noun] The action or process of showing the existence or truth of something by giving proof or evidence.
Example: it is not capable of mathematical demonstration
Definition: [noun] A practical exhibition and explanation of how something works or is performed.
Example: a microwave cooking demonstration
Definition: [noun] A public meeting or march protesting against something or expressing views on a political issue.
Example: a pro-democracy demonstration