The meaning of RAT is any of numerous rodents (Rattus and related genera) differing from the related mice especially by considerably larger size. How to use rat in a sentence.

RAT definition: any of several long-tailed rodents of the family Muridae, of the genus Rattus and related genera, distinguished from the mouse by being larger. See examples of rat used in a sentence.

RAT definition: 1. a medium-sized rodent, similar to but larger than a mouse, that has a long tail. Wild rats are…. Learn more.

1. any of several long-tailed rodents of the Old World family Muridae, esp. of the genus Rattus, resembling but larger than mice.

If you call someone a rat, you mean that you are angry with them or dislike them, often because they have cheated you or betrayed you.

Definition of rat noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

RAT meaning: 1 : a small animal that has a pointed nose and a long, thin tail; 2 : a person who is not loyal or who cannot be trusted

Rats are mouse-like rodents with long tails, pointed noses, and whiskers. Rats are often associated with filth and disease. So, if someone calls you a rat, it's not like being called a fox. It's an insult.

rat /ræt/ n any of numerous long-tailed murine rodents, esp of the genus Rattus, that are similar to but larger than mice and are now distributed all over the world

There are about 56 different species of rats. The best known rats are the black rat (Rattus rattus), and the brown rat (Rattus norvegicus). These two are known as Old World rats. The group has its origins …