Definition from Wiktionary, the free dictionary
- (historical) A colonial territory owned by France in the 17th and early 18th centuries, spanning over what is now northeast USA and the Maritime provinces of eastern Canada (Nova Scotia, New Brunswick, Prince Edward Island, and Newfoundland)
- Acadia National Park, a national park in Maine
- A parish in southern Louisiana settled by Acadian exiles.
a French colonial territory in North America
First declension, with locative.