1. (n.)narcotic any of a class of habituating or addictive substances that blunt the senses and in increasing doses cause confusion, stupor, coma, and death: some are used in medicine to relieve intractable pain or induce anesthesia.
2. narcotic anything that exercises a soothing or numbing effect or influence.
3. (adj.)narcotic of or having the power to produce narcosis, as a drug.
Etymology: (1350–1400; ME narcotik(e) (n.) < ML narcōticum < Gk narkōtikón, n. use of neut. of narkōtikós numbing =narkō-, var. s. of narkoûn to numb (see narcosis ) +-tikos -tic)
Definition of 'narcotic'
Princeton's WordNet
1. (adj)narcotic a drug that produces numbness or stupor; often taken for pleasure or to reduce pain; extensive use can lead to addiction
2. (adj)narcotic of or relating to or designating narcotics "narcotic addicts"; "narcotic stupor"
4. (adj)narcotic, soporiferous, soporific inducing mental lethargy "a narcotic speech"
Definition of 'narcotic'
Webster Dictionary
1. (adj)narcotic having the properties of a narcotic; operating as a narcotic
2. (noun)narcotic a drug which, in medicinal doses, generally allays morbid susceptibility, relieves pain, and produces sleep; but which, in poisonous doses, produces stupor, coma, or convulsions, and, when given in sufficient quantity, causes death. The best examples are opium (with morphine), belladonna (with atropine), and conium
Definitions of narcotic 
Afrikaans: slaapmiddel, verdowingsmi
Arabic: مُخَدِّر
Bulgarian: наркотик
Brazilian: narcótico
Czech: narkotikum
German: das Narkotikum
Danish: narkotika
Greek: ναρκωτικό, υπνωτικό
Spanish: narcótico, estupefaciente
Estonian: narkootikum
Farsi: نوعی مسکن مخدر
Finnish: huumausaine
French: narcotique
Hebrew: סַם הַרגָעָה
Hindi: नींद लाने वाली दवा
Croatian: narkotik, lijek za spavan
Hungarian: altató; kábítószer
Indonesian: obat bius
Icelandic: kvalastillandi lyf, deyfi
Italian: narcotico
Japanese: 麻酔薬 (の)
Korean: 마취제, 수면제
Lithuanian: narkotikas
Latvian: narkotika
Malay: narkotik
Dutch: verdovend middel
Norwegian: narkotisk middel
Polish: narkotyk
Persian: نوعی مسکن مخدر
Pashto: مخدره توكى
Portuguese: narcótico
Romanian: narcotic
Russian: наркотическое средство, н
Slovak: narkotikum
Slovenian: mamilo
Serbian: narkotik
Swedish: narkotiskt medel
Thai: ยานอนหลับเสพติด
Turkish: uyuşturucu
Taiwanese: 麻醉劑，鎮靜劑
Ukrainian: наркотик
Urdu: خواب آور
Vietnamese: thuốc mê; ma tuý
Chinese: 麻醉剂，镇静剂
