What is a non-egress room?

Question

I keep seeing real estate ads say this. Do they mean non-egress windows?

Answer 1

I think it means a room like a walk-in closet, which has no exit to the outside of the house.

Answer 2

Not sure if that applies to rooms above ground.  But you are generally not supposed to have a bedroom in a basement unless it has extra large windows that are easy to get out of in the event of fire.  And it would be a good idea to have windows in any other bedroom that allow easy emergency exit.