- a government agent or detective charged with the enforcement of laws restricting the use of narcotics.
- US slang a narcotics agent
n.1967 (earlier narco, 1960), American English slang, shortened form of narcotics agent. Had been used 1955 for narcotics hospital, 1958 for narcotics addict. Sense and spelling tending to merge with older but unrelated nark (q.v.).