Meaning

noun a short plaid coat made of made of thick woolen material

noun a thick plaid blanket formerly used in the northwestern United States

noun a flat-bottomed boat used on upper Great Lakes

originRespelling of Mackinac, a strait between Lake Huron and Lake Michigan, an island in the strait, and an important trading-post on the island; ultimately from Ojibwe mishinii-makinaang (“at the place of many snapping turtles”).

Etymology from Wiktionary, CC BY-SA 3.0