demonstrate

[dem-uhn-streyt]
verb (used with object), demonstrated, demonstrating.
1.
to make evident or establish by arguments or reasoning; prove: to demonstrate a philosophical principle.
2.
to describe, explain, or illustrate by examples, specimens, experiments, or the like: to demonstrate the force of gravity by dropping an object.
3.
to manifest or exhibit; show: He demonstrated his courage by his actions in battle.
4.
to display openly or publicly, as feelings: to demonstrate one's anger by slamming a door.
5.
to exhibit the operation or use of (a device, process, product, or the like), usually to a purchaser or prospect: to demonstrate an automobile.
verb (used without object), demonstrated, demonstrating.
6.
to make, give, or take part in, a demonstration: The pickets required a license to demonstrate.
7.
Military. to attack or make a show of force to deceive an enemy.

Origin:
1545–55; < Latin dēmonstrātus, past participle of dēmonstrāre to show, point out, equivalent to dē- de- + monstrāre to show, verbal derivative of monstrum sign, portent

demonstratedly, adverb
counterdemonstrate, verb (used without object), counterdemonstrated, counterdemonstrating.
predemonstrate, verb (used with object), predemonstrated, predemonstrating.
redemonstrate, verb, redemonstrated, redemonstrating.
subdemonstrate, verb (used with object), subdemonstrated, subdemonstrating.
undemonstrated, adjective
well-demonstrated, adjective


1. show, confirm, verify, corroborate.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
demonstrate (ˈdɛmənˌstreɪt)
 
vb
1.  (tr) to show, manifest, or prove, esp by reasoning, evidence, etc: it is easy to demonstrate the truth of this proposition
2.  (tr) to evince; reveal the existence of: the scheme later demonstrated a fatal flaw
3.  (tr) to explain or illustrate by experiment, example, etc
4.  (tr) to display, operate, and explain the workings of (a machine, product, etc)
5.  (intr) to manifest support, protest, etc, by public parades or rallies
6.  (intr) to be employed as a demonstrator of machinery, etc
7.  (intr) military to make a show of force, esp in order to deceive one's enemy
 
[C16: from Latin dēmonstrāre to point out, from monstrāre to show]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

demonstrate
1550s, "to point out," from L. demonstrat-, pp. stem of demonstrare (see demonstration). Meaning "to point out by argument or deduction" is from 1570s. Related: Demonstrated (1670s).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Instead, they have to demonstrate that they are actively benefiting the public.
No longer will officials and the public feel so constrained by a need to
  demonstrate a unity of purpose.
Your primary goal is not to show off your profundity but to demonstrate how
  effectively you can communicate.
These comments demonstrate the usual mix of information and misinformation in
  the public domain regarding atomic energy.
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