Definition of stupefacient in English:

stupefacient

adjective

Medicine
  • (chiefly of a drug) causing semi-consciousness.

noun

Medicine
  • A stupefacient drug.

    • ‘In his column George Will wrote that our yearly consumption of stupefacients amounts to $50 billion.’
    • ‘Although some local fishers were trained by foreign fishers to use cyanide as a stupefacient, others found that they could catch live food reef fish using traditional methods, or variations of them.’
    • ‘Sanitary permits prior to import of raw materials for or of finished medical products, including permits for importing narcotics and stupefacients.’
    • ‘Regarding analgesics, he was remarkably current: ‘The most powerful of the stupefacients is opium.’’
    • ‘Methadone is a kind of artificial stupefacient.’
    drug, narcotic, mind-altering drug, sedative, tranquillizer, depressant, sleeping pill, soporific, anaesthetic, painkiller, analgesic, anodyne
    View synonyms

Origin

Mid 17th century: from Latin stupefacient- stupefying, from the verb stupefacere.

Pronunciation:

stupefacient

/ˌstjuːpɪˈfeɪs(ə)nt/