We found 7 dictionaries that define the word norway rats:

General (5 matching dictionaries)

1. Norway rats: Merriam-Webster
2. Norway rats: Collins English Dictionary
3. Norway rats: Vocabulary.com
4. Norway rats: Wiktionary
5. Norway rats: TheFreeDictionary.com

Computing (1 matching dictionary)

6. Norway rats: Encyclopedia

Medicine (1 matching dictionary)

7. Norway rats: Medical dictionary

(Note: See norway_rat as well.)

Definitions from Wiktionary (Norway rat) ▸ noun:  The brown rat (Rattus norvegicus). ▸ Also see norway_rat ▸ Words similar to norway rats ▸ Usage examples for norway rats ▸ Idioms related to norway rats ▸ Wikipedia articles (New!) ▸ Words that often appear near norway rats ▸ Rhymes of norway rats ▸ Invented words related to norway rats