"Emergency exit" refers to a special door or route that you use in a dangerous or urgent situation to quickly get out of a building or a vehicle, such as during a fire or an accident. It's a way to escape and be safe when there is an emergency.
Even More Space seats are those roomy seats located either in emergency exit rows or at the front of a plane that offer passengers 38 inches of pitch. (upgradedpoints.com)
Both have emergency exit seats with acres of leg - room. (Dive-The-World.com)
If the window is a potential emergency exit, make sure an adult can quickly open the latch if necessary. (babycenter.com)