If you've been following the Air Canada strike throughout its twists and turns, you've likely heard the term "ground pay," or noticed flight attendants holding signs decrying unpaid labour. But what is that unpaid work?

Air Canada and the union representing 10,000 flight attendants resumed talks late Monday for the first time since the flight attendants' strike began over the weekend.

While Air Canada says it would not negotiate with the union until flight attendants return to work, CUPE says the two sides were in discussions Monday night with a mediator.