Upper Peninsula

American

noun

the peninsula between lakes Superior and Michigan constituting the N part of Michigan. U.P.

Upper Peninsula British

noun

a peninsula in the northern US between Lakes Superior and Michigan, constituting the N part of the state of Michigan

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Upper Peninsula

Switzerland, which is about the size of Michigan’s Upper Peninsula, has a population of some 9.1 million that has grown by about 25% in the 21st century.

From The Wall Street Journal ● Jun. 14, 2026

It will harm those in Arizona who cannot withstand the heat, and it will harm those in Michigan’s Upper Peninsula who cannot stand the cold or snow.

From Slate ● Aug. 26, 2025

I’m not talking about a motel in the boonies of the Upper Peninsula of Michigan or a drafty log cabin on a lake in Maine or Minnesota.

From Salon ● May 7, 2024

Pietila moved to the Lansing area from the Upper Peninsula when he was 16 years old.

From Seattle Times ● Mar. 4, 2024

In the course of their travels, the family visited Iron Mountain, Michigan, a small mining town in the forests of the Upper Peninsula that was Billie’s childhood home.

From "Into the Wild" by Jon Krakauer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023