What you think it means: Animals were allowed to roam freely in an open range (pasture).
What It Actually Means: The term free range guarantees access to outdoor space, but not necessarily a pasture. Sadly, there is not legal standard for “free-range”. It just means the animal had access to outdoor space.
Take Away: Again, I just rely on my gut when I am asking my butcher questions here. Generally, I ask for meat that is organic, pasture raised, and humane. Unless I go to the farms myself there is no real way of knowing.