Addiction to a drug or drugs, especially developed through habitual non-medicinal use of an illegal drug, such as a narcotic, opiate, or hallucinogen; an instance of this.
Origin
Late 19th century.
Definition of drug addiction in US English:
drug addiction
noun
Addiction to a drug or drugs, especially developed through habitual non-medicinal use of an illegal drug, such as a narcotic, opiate, or hallucinogen; an instance of this.