A cargo boat, with a large flat bottom and sharp ends, formerly used on the Great Lakes and the Missouri River (to a lesser extent, elsewhere). / A shooner-rigged boat once used on the Great Lakes.

(historical) A flat-bottomed cargo boat, resembling a canoe, often schooner-rigged, formerly used on the Great Lakes and the Missouri River (to a lesser extent, elsewhere).

The lake trout or North American lake trout, Salvelinus namaycush.

A mackinaw coat.

A heavy woolen cloth. / A blanket made of wool, formerly distributed to the Amerindians by the U.S. government. / A flat-bottomed cargo boat; mackinaw boat.

A waterproof long coat made of rubberized cloth. / By extension, any waterproof coat or raincoat. / Waterproof rubberized cloth.

plural of mackinaw

Clad in garments made of mackinaw.

present participle of mack

plural of mackintosh