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Definition of demonstration : 1. ( Mil.) a decisive exhibition of force, or a movement indicating an attack.
2. A course of reasoning showing that a certain result is a necessary consequence of assumed premises; - these premises being definitions, axioms, and previously established propositions.
3. An expression, as of the feelings, by outward signs; a manifestation; a show.
4. The act of demonstrating; an exhibition; proof; especially, proof beyond the possibility of doubt; indubitable evidence, to the senses or reason.
5. The act of proving by the syllogistic process, or the proof itself.
6. The exhibition and explanation of a dissection or other anatomical preparation.

Synonyms:

materialisation, presentment, testimonial, protest, verification, introduction, induction, demo, testament, certainty, true, ostensorium, monstrance, notification, consequence, explanation, inference, sit-in, reflexion, intro, reflection, warrant, deduction, conclusion, march

demonstration (part of speech: noun)

expose, show

manifestation (part of speech: noun)

exhibition, manifestation, discernibility, revelation, showing, materialization, evidence, incarnation, symptom, disclosure, exposure, presentation, staging, embodiment, proof, unfolding, display, appearance, expression

evidence (part of speech: noun)

confirmation, connotation, information, declaration, data, determination, authentication, establishment, exemplification, specimen, validation, exhibit, counter-evidence, quotation, fact, deposition, support, corroboration, illustration, observation, statement, substantiation, testimony, indication, attestation, documentation, certification

Usage examples: