Funds from Operations (FFO) -- Which is it?

I’ve seen numerous questions from both Schweser and CFAI referring to “Funds From Operations (FFO)”. However, along with these numerous questions I’ve also seen it defined multiple ways including: FFO = EBIT FFO = NI + NCC Can someone clarify what FFO actually is? Thanks.

http://www.answers.com/topic/funds-from-operations-ffo CFA uses the same words in different context. I would suggest that you see the question, think what it is actually asking and then try to answer it.