a wooded island in N Michigan, in the Straits of Mackinac (a channel between the lower and upper peninsulas of Michigan): an ancient Native American burial ground; state park. Length: 5 km (3 miles)
Mackinac in American English
(ˈmækəˌnɔ)
noun
1. See Straits of Mackinac
2. Also: Mackinac Island
an island in Lake Huron at the entrance of this strait. 517; 3 mi. (5 km) long