Addiction has been defined as a dependence, both physically and physiologically, on psychoactive substances. Usually, withdrawal symptoms emerge once the person with an addiction, voluntarily or involuntarily, stops taking the substance he is dependent on. Perhaps the operative word for this definition is “psychoactive substances,” and this is how the common agents of addiction recognized in the world are generally classified: alcohol and illegal drugs such as heroin, marijuana, cocaine and many others.
Addiction to these is considered dangerous: the person addicted can not only hurt himself but others as well. That is why people who are dependent on these substances should seek professional help and know how to overcome an addiction right away.
But there are countless other forms of addiction that it would be unfair to limit the word to the involvement of such substances. For instance, some say they are addicted to reality TV, while others claim they are addicted to candy bars. Some deal with an addiction to miniature cars, while others cope with an addiction to sex.
Addiction, means a dependence that can prevent you from enjoying life to the fullest.