(chiefly of a drug) causing semiconsciousness.
A stupefacient drug.
drug, narcotic, mind-altering drug, sedative, tranquillizer, depressant, sleeping pill, soporific, anaesthetic, painkiller, analgesic, anodyneView synonyms
- ‘Regarding analgesics, he was remarkably current: ‘The most powerful of the stupefacients is opium.’’
- ‘Methadone is a kind of artificial stupefacient.’
- ‘Sanitary permits prior to import of raw materials for or of finished medical products, including permits for importing narcotics and stupefacients.’
- ‘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.’
Mid 17th century: from Latin stupefacient- stupefying from the verb stupefacere.