Intense, irrational fear of open spaces, characterized by marked fear of being alone or of being in public places where escape would be difficult or help might not be available.

Agoraphobia is a mental and behavioral disorder, specifically an anxiety disorder characterized by symptoms of anxiety in situations where the person perceives their environment to be unsafe with no easy way to escape. These situations can include public transit, shopping centers, crowds and queues, or simply being outside their home on their own...