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We found 3 dictionaries with English definitions that include the word koppen:
Click on the first link on a line below to go directly to a page where "koppen" is defined.

General (3 matching dictionaries)

1. Koppen: Wordnik [home, info]
2. Koppen: Wikipedia, the Free Encyclopedia [home, info]
3. Koppen: Rhymezone [home, info]

Quick definitions from WordNet (Koppen) ▸ name:  A surname (very rare: popularity rank in the U.S.: #37629) ▸ Words similar to koppen ▸ Usage examples for koppen ▸ Words that often appear near koppen ▸ Rhymes of koppen ▸ Invented words related to koppen