Changing the definition of life?
How can really even draw a defined line of what life is?


It's easy, really: just make one.  In the answer I linked to I go into the reasons why viruses aren't alive (spoiler alert: no ribosomes) and what our current definition is, but the bigger question is why does it matter?  We can draw the line wherever we want to, but it's still an arbitrary construct placed onto the universe by humans so we can sleep at night.  It's similar to intelligence.  We draw arbitrary lines around primates and dolphins and elephants and pigs and what have you, because they're the smartest and most thinking, but that's only for our own (legal) convenience.  Intelligence and awareness is a spectrum, there needn't be a point beyond which you "count."  There's no reason life can't be the same way.

Edit 1.5 years later to add a short, somewhat fanciful video I just watched, it goes into some of the complexity and difficulty with defining life; viruses show up about half way through.  It waxes philosophical toward the end, but that's sort of my point.  Arbitrary delineations are just that.