Addiction is a compulsive, often uncontrollable dependence on a substance or behavior that persists despite harm — and, in an older and now largely obsolete sense, simply a strong inclination or devotion.
The word arrives in English around 1600 meaning "tendency, inclination, penchant," with no pathology attached; by the 1640s it names the state of having given oneself over to a habit or a pursuit. It comes from Latin addictio, "an awarding, a delivering up," the noun of action from addicere, "to deliver, award; devote, consecrate" — the image is of being made over to something, assigned to it. The verb addict entered English in the 1530s in the same voluntary sense, "to devote or give up oneself." The now-dominant sense of physiological compulsion following prior use of a drug is only about a century old, attested by 1906 in reference to opium, with an isolated 1779 use concerning tobacco.
That history explains a live tension in the word. Clinical usage treats addiction as a disorder of the brain's reward circuitry, the territory of 📝Dopamine Seeking Behavior, while the older sense of devotion survives in casual speech, where someone is "addicted" to a show or a sport. It is distinct from 📝habit, which is automatic but not compulsive, and from physical dependence, which describes tolerance and withdrawal without necessarily involving craving or loss of control. A third framing, argued by Dr. Gabor Maté in In the Realm of Hungry Ghosts, treats addiction as neither crime nor illness but as a coping response to unresolved suffering — a view that moves the question from what the substance does to what the pain requires.
"Addiction is not a choice that anybody makes; it's not a moral failure. What it actually is: it's a response to human suffering." ~ Dr. Gabor Maté