Definition of Norway rat in English:

Norway rat


  • another term for brown rat
    • ‘Invasive rodents, such as the Norway rat, are known to cause major disruptions to isolated ecosystems.’
    • ‘Such a rapid expansion of range is unprecedented for a native vertebrate (though invaders from Europe, such as the house sparrow and the Norway rat, have managed similar feats).’
    • ‘Today, Norway rats (aka brown rats) can be found on every continent of the world except Antarctica.’
    • ‘The threats posed by some species are obvious; for example, Norway rats are decimating seabird colonies on islands in Alaska where mammalian predators were naturally absent.’
    • ‘Although Alcatraz has no feral cats, which would be a major threat to the nesting birds, Norway rats were seen recently for the first time.’


Norway rat