Do you have an alibi?

This is a line you might hear on any one (of the many) television shows with a theme about cops, crime or legal proceedings.  The word alibi is a pure Latin word that has been integrated directly into the English language.

It means “elsewhere”, so when the TV show depicts a scene in Los Angeles and a crime has been committed on Sunset Boulevard; What the investigator is asking the suspect is “Do you have an alibi?” or “Where you somewhere else?” when this crime was committed.