Cage-free birds live in large houses in flocks up to several thousand. While they might never go outside, they are able to walk around, spread their wings, and lay eggs in nests. There is no regulated definition of this term.
Example of Cage-Free:
Industrialized chicken farming are well associated with confinement of the birds, where they do not have space to move or exercise. This practice is seen as cruel and inhumane, and therefore more people are converting to eating only cage free birds that are raised more humanely in a larger area where they can roam free.