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

Joslin was fighting a heroin addiction, according to the memo. —Chris Spargo, PEOPLE, 31 Oct. 2025

When pills became scarce, heroin filled the void. —Michele Steeb, Oc Register, 29 Oct. 2025

These individuals were charged with distributing fentanyl, heroin, and cocaine on one of the most prolific drug blocks in Philadelphia. —Mandy Taheri, MSNBC Newsweek, 25 Oct. 2025

There is even Depardieu’s own late son, Guillaume, whose death at age thirty-seven was hastened along by heroin use that had ruined his health, and over whom Ferrara recalls Depardieu shedding copious tears during one of their early meetings. —Nick Pinkerton, Harpers Magazine, 24 Oct. 2025

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