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The common domestic rat (Rattus norvegicus), which is found worldwide and is a destructive pest of crops and stored food and a carrier of disease. Also called Norway rat.
(Animals) a common brownish rat, Rattus norvegicus: a serious pest in all parts of the world. Also called: Norway rat
an Old World rat, Rattus norvegicus, having a grayish brown body and a long, scaly tail: introduced worldwide. Also called brown rat.
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|Noun||1.||brown rat - common domestic rat; serious pest worldwide|
rat - any of various long-tailed rodents similar to but larger than a mouse
wharf rat - brown rat that infests wharves
sewer rat - brown rat commonly found in sewers