Definition: A term for addressing someone who has been at work or school longer than oneself. A senior, a superior, an older graduate, an old-timer.
A person can refer to someone as a Sempai or they can append it to the end of their name like an honorific.
The opposite term or the term for a Sempai referring to their junior is a Kouhai
- This term appears a lot in school dramas. Pick any show where the school is the setting and one is likely to hear it.