But the UP isn't only about the great outdoors. Marquette and the UP's smaller towns, such as Sault Ste. Marie, Houghton and Hancock, charm with attractions. Upper Peninsula Travel and Recreation Association. Tags: Upper Peninsula, Boating, Lighthouses, Hiking, Michigan, Lake Michigan.
Wiktionary (0.00 / 0 votes) Rate this definition: skeleton key (Noun). A very simple design of key that usually has a cylindrical shaft (sometimes called a shank) and a single, minimal flat, rectangular tooth or bit. skeleton key (Noun). A key that has parts filed away so that it will open a range of locks.
Map Key or Legend. A map key or legend is included with a map to unlock it. It gives you the information needed for the map to make sense. Maps often use symbols or colors to represent things, and the map key explains what they mean. Map keys are often boxes in the corner of the map, and the information they give you is essential to understanding the map. Symbols in the key might be pictures or icons that represent different things on the map.