transitive verb demonstrated -·strat′ed, demonstrating -·strat′·ing

1. to show by reasoning; prove
2. to explain or make clear by using examples, experiments, etc.
3. to show the operation or working of; specif., to show (a product) in use in an effort to sell it
4. to show (feelings) plainly

Etymology: < L demonstratus, pp. of demonstrare, to point out, show < de-, out, from + monstrare, to show: see muster

intransitive verb

1. to show one's feelings or views by taking part in a mass meeting, parade, etc.
2. to show military power or preparedness