Originally posted by: -Sharingan-Kakashi-
I noticed the purple hair anbu lady called Kakashi senpai, at first I thought it maybe mean relative so I looked it up and it means superior, so is Kakashi stronger than that anbu lady? cuz i always thought the anbu were strongest in the village.
It doesn't mean that he is stronger. It just means that he's been a Ninja for more time than she was.
Here's an example that will clarify this:
You're in the 10th grade and is talking to somebody who's in the 11th grade. You will call that person by his or her name plus senpai. You've been working at a place for 6 months, talking to somebody who's been working there for 3 years. Same thing, name plus senpai.
If you're a girl or a guy and is talking to a guy in the exact same level that you are, and you're his friend you will call this guy by his name plus kun.
Easy, ain't it?