In the United States,
USDA free range regulations currently apply only to poultry and indicate that the animal has been allowed access to the outside.
[3] The USDA regulations do not specify the quality or size of the outside range nor the duration of time an animal must have access to the outside.
[4]
The term "free range" is mainly used as a marketing term rather than a husbandry term, meaning something on the order of, "low stocking density," "pasture-raised," "grass-fed," "old-fashioned," "humanely raised," etc.
There have been proposals to regulate USDA labeling of products as free range within the United States. As of 2017 what constitutes raising an animal "free range" is almost entirely decided by the producer of that product, and is frequently inconsistent with consumer ideas of what the term means.
got the above from wikipedia, free range in America means they spend a percentage of there life outside. the term "free range" is very loosely used in commerce. on the farmer side " free range" refers to animal husbandry, it is a way of raising your animals so they get most of there food on the range. ( i won't go too much into that as i am not knowledgable enough to explain it.
so in short ( correct me if im wrong BYC members) but as long as you birds are out of the coop for the majority of there lives they are free range. i have a run thats 150ft by 150 ft for 13 chickens. this year i wouldn't call them "free range" but i believe i could call mine free ranged, next year when i open the gate every day ill call them free range XD