proper noun/ɡʁɑ̃ de.ʁɑ̃ʒ.mɑ̃/
period in Acadian history between 1749 or 1750 and 1780 or 1820, including the expulsion of the Acadians from Acadia under British rule during the Seven Years' War (or the French and Indian War in American historiography) between 1755 and 1763.
Literally, “Great Upheaval”.