rat
//ræt//
Noun
ratSingular
ratsPlural
1
A rodent with a long tail, larger than a mouse, that is often considered a pest
There are rats in the basement.
2
A person who is disloyal or who betrays others, especially by informing on them
He's a rat who told the police about our plans.
3
A despicable or contemptible person
He's a rat who betrayed his friends for money.
Verb
1
To hunt or catch rats
The farmer's dog loves to rat in the barn.
2
To betray or inform on someone, especially to authorities
He ratted on his friends to the police.