"qui" means who. Here are examples that will help you understand how to use "qui". It is the same as in English:

  • Qui est le propriétaire de la voiture ? Audio. Press to listen!
    Who is the owner of the car?
  • Qui est-ce ? Audio. Press to listen!
    Who is it?
  • Qui est cette femme ? Audio. Press to listen!
    Who is that woman?
  • Qui peut dire une chose pareille ? Audio. Press to listen!
    Who can say such a thing?