VERB: dem·on·strat·ed, dem·on·strat·ing, dem·on·strates VERB: tr.
To show clearly and deliberately; manifest: demonstrated her skill as a gymnast; demonstrate affection by hugging.
To show to be true by reasoning or adducing evidence; prove: demonstrate a proposition.
To present by experiments, examples, or practical application; explain and illustrate: demonstrated the laws of physics with laboratory equipment.
To show the use of (an article) to a prospective buyer: The salesperson plugged in and demonstrated the vacuum cleaner.
VERB: intr.
To give a demonstration: described the dance step, then took a partner and demonstrated.
To participate in a public display of opinion: demonstrated against tax hikes.
ETYMOLOGY: Latin dmnstrre, dmnstrt- : d-, completely ; see de- + mnstrre, to show (from mnstrum, divine portent, from monre, to warn; see men-1 in Indo-European roots)