What is a "predator"?

I'm 16 years old. I just had a conversation with my parents that I can't really understand. So I want to ask you people what do you think is a "predator"? Is it a 40 year old man who wants to have sex with a 15 year old girl? Is it a 30 year old woman who wants to have sex with a 15 year old boy?<br><br>I can't understand why people say "predator" in such a way as if the term has a very clear meaning.<br><br>My parents told me that there is a "predator" in their neighborhood, and that it's not a person, but a "predator" as in a large animal, which I don't really get.<br><br>I can't really understand the term "predator". Is it only an animal?