An addiction is an excessive dependence on particular substances or actions, with physical and psychological consequences. An individual with an addiction is known as an addict. (TNG: "Symbiosis")

The Ktarian game had addictive effects, through stimulating the pleasure centers of the brain. (TNG: "The Game")

The term could be used loosely to describe something with which one could become harmlessly obsessed. In 2374, Harry Kim described the Vulcan game kal-toh as "addictive" to Seven of Nine. (VOY: "The Omega Directive")


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