To be without God's love and to be unable to be saved or helped. Your basically given to the devil and his demons/fallen angels for him to do what he wants to you, like a demented prison of sorts. The devil being a forced warden and you being his convicts. Hell is usually described as a dark yet unbelievably hot and burning place. Many people are usually tortured in some form or another and some believe forced to suffer individual pains meant specially designed for their individual sins. Some people actually believe hell to be a cold place since it is without the warmth of God.