heroin

noun

her·​o·​in ˈher-ə-wən 

ˈhe-rə-

: a strongly physiologically addictive narcotic C₂₁H₂₃NO₅ that is made by acetylation of but is more potent than morphine and that is prohibited for medical use in the U.S. but is used illicitly for its euphoric effects

heroinism

ˈher-ə-wə-ˌni-zəm 

ˈhe-rə-

noun

Examples of heroin in a Sentence

Recent Examples on the Web

Another thing that a lot of these jam band fans love is drugs — tripping, smoking weed, rolling on MDMA, doing peyote or ayahuasca, and eventually many of them loved smoking crack and shooting heroin. —David Manheim, Rolling Stone, 19 Feb. 2026

In 2025, authorities seized 41 tons of methamphetamine, 23 tons of marijuana, 5 tons of cocaine, 182 kilograms of fentanyl and 166 kilograms of heroin throughout the state. —Alexandra Mendoza, San Diego Union-Tribune, 15 Feb. 2026

Treating a vape pen the same as heroin is a failure of common sense. —Eleanor Dearman, Fort Worth Star-Telegram, 14 Feb. 2026

The year is 1961, and the jazz legend (played flawlessly by Norway’s Anders Danielsen Lie) is firmly in the grip of a raging heroin addiction, having acquired a taste for the destructive street drug made inexplicably romantic in postwar boho circles. —Damon Wise, Deadline, 13 Feb. 2026

Word History

Etymology

from Heroin, a trademark

First Known Use

1898, in the meaning defined above

Rhymes for heroin

• heroine

Kids Definition

heroin

noun

her·​o·​in ˈher-ə-wən 

: a strongly addictive drug made from the opium poppy and stronger than morphine

Medical Definition

heroin

noun

her·​o·​in ˈher-ə-wən 

: a strongly physiologically addictive narcotic C₂₁H₂₃NO₅ that is made by acetylation of but is more potent than morphine and that is prohibited for medical use in the United States but is used illicitly for its euphoric effects

called also acetomorphine, diacetylmorphine, diamorphine