The term 'State of Decay' can be summarized as a state of decline or deterioration. This is often used to describe a situation in which something has become worse over time, such as a political system, a culture, or an economy. The crossword solution for this term is 'DECADENCE, ' which means the process of becoming morally or physically weaker or worse. It is often used to describe a period of moral decline or a lack of progress.