Mjøsa

Proper noun

 * 1) Norway's largest lake, creating a natural border between Toten and Hedemarken. The cities like Gjøvik, Brumunddal, Hamar, Minnesund, Lillehammer and Moelv are located on the coast of this lake.

Etymology
Definite form; from, from , an s-derivation of , whence also.

Usage notes
Compounds with use the indefinite form.