What does this symbol mean?
I am asking about the symbol before the fermata, I found this in this publication of nuvole bianche, bar 98.
It's still a fermata and is typically referred to as triangle fermata. It's shorter than a typical fermata, but holds the same idea of prolonging the note longer than the value written. There's another variant of the fermata referred to as a square fermata that you hold longer than a typical fermata. You can see them all in the Dolmetsch musical symbols dictionary.
It is just a "shorter" fermata. Not official notation (actually, what is official) but modern composers used different shapes of fermatas to indicate different lengths. Most notably Poulenc.
Still, it remains subjective. Fermatas are never a precise alteration.
It's a modern version of a fermata. See: http://en.wikipedia.org/wiki/Fermata.
Some composers use these to represent differing lengths of pauses.