What does it mean when you say America at large?

"America at large" is a phrase that is used to refer to the United States of America as a whole, including all of its states, territories, and possessions. It is often used in contrast to a specific region or location within the United States. For example, someone might say "America at large is experiencing a cold winter this year" to indicate that the entire country is experiencing cold weather, rather than just one specific region.