This is the 248th most frequent Norwegian word.
polen
"Polen" in Norwegian means "the pole" (as in North or South Pole) or "Poland," depending on context.
In this sentence, 'Polen' is used as a proper noun referring to the country Poland.
Polen er et land i Europa.
Poland is a country in Europe.
Here, 'polen' is a definite article meaning 'the pole,' a part or end of a magnet or similar objects.
Han var interessert i å studere polen til magneten.
He was interested in studying the pole of the magnet.
In this usage, 'pollen' has a different orthography but is a homonym used in context related to plants.