Also means
demo, public protest
Usage Note
Démonstration covers both a logical or mathematical proof and a practical demonstration of how something works (une démonstration de cuisine — a cooking demo). In political contexts it can also mean a public demonstration or march, though manifestation (or colloquially manif) is more common for protests. The verb is démontrer.
Examples
"Le professeur a fait une démonstration au tableau."
Natural Translation
The teacher gave a demonstration on the board.

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