[ fen-tuh-nil ]

  1. a synthetic, short-acting narcotic analgesic and sedative, C22H28N2O, used pharmacologically in anesthesia and neuroleptanalgesia, and also as an illicit drug: Medics quickly administered fentanyl to the injured soldiers.Drug dealers are lacing heroin with fentanyl.

Origin of fentanyl

First recorded in 1960–65; contraction and respelling of the chemical name N-(1-phenethyl-4-piperidyl)propionanilide

Words Nearby fentanyl

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use fentanyl in a sentence

British Dictionary definitions for fentanyl


/ (ˈfɛntəˌnaɪl) /

  1. a narcotic drug used in medicine to relieve pain

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012