addiction: noun
1: a compulsive, chronic, physiological or psychological need for a habit-forming substance, behavior, or activity having harmful physical, psychological, or social effects and typically causing well-defined symptoms (such as anxiety, irritability, tremors, or nausea) upon withdrawal or abstinence: the state of being addicted
2: a strong inclination to do, use, or indulge in something repeatedly
Source: Merriam-Webster Dictionary
