informer

noun
     
in‧form‧er [countable]
someone who secretly tells the police, the army etc about criminal activities, especially for money

Dictionary results for "informer"
Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.