verb (used with object), dem·on·strat·ed, dem·on·strat·ing.
- to make evident or establish by arguments or reasoning; prove: to demonstrate a philosophical principle.
- to describe, explain, or illustrate by examples, specimens, experiments, or the like: to demonstrate the force of gravity by dropping an object.
- to manifest or exhibit; show: He demonstrated his courage by his actions in battle.
- to display openly or publicly, as feelings: to demonstrate one’s anger by slamming a door.
- 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), dem·on·strat·ed, dem·on·strat·ing.
- to make, give, or take part in, a demonstration: The pickets required a license to demonstrate.
- Military. to attack or make a show of force to deceive an enemy.
- (tr) to show, manifest, or prove, esp by reasoning, evidence, etcit is easy to demonstrate the truth of this proposition
- (tr) to evince; reveal the existence ofthe scheme later demonstrated a fatal flaw
- (tr) to explain or illustrate by experiment, example, etc
- (tr) to display, operate, and explain the workings of (a machine, product, etc)
- (intr) to manifest support, protest, etc, by public parades or rallies
- (intr) to be employed as a demonstrator of machinery, etc
- (intr) military to make a show of force, esp in order to deceive one’s enemy
1550s, “to point out,” from Latin demonstratus, past participle of demonstrare (see demonstration). Meaning “to point out by argument or deduction” is from 1570s. Related: Demonstrated; demonstrating.