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controlled substance


a drug or chemical substance whose possession and use are controlled by law


artifact noun (man-made objects)


controlled substances

Original source:

Princeton WordNet

Definition references  (+images)


Controlled substance

generally a drug or chemical whose manufacture, possession, or use is regulated by a government. Controlled substances are substances that are the subject of legislative control. This may include illegal drugs and prescription medications. In the U.S.,... (37 of 195 words)

en​.wikipedia​.org​/wiki​/Controlled substance

Macmillan British Dictionary:

controlled substance [countable, law] | controlled substances [plural]

a drug or chemical that the law does not allow you to make, own or use (16 of 46 words)


Random House Dictionary:

controlled substance

any of a category of behavior-altering or addictive drugs, as heroin or cocaine, whose possession and use are restricted by law. (21 of 23 words)



controlled substance [idiomatic] | controlled substances [plural]

A drug deemed to be illegal by a government except for very limited professional testing purposes. (16 of 18 words)

en​.wiktionary​.org​/wiki​/controlled substance

American Heritage Dictionary:

controlled substance

A drug or chemical substance whose possession and use are regulated under the Controlled Substances Act. (16 of 17 words)


New World Dictionary:

controlled substance [United States]

a drug regulated by the Federal Controlled Substances Acts, including opiates, depressants, stimulants, and hallucinogens (15 of 16 words)


Britannica Encyclopedia:

drug [chemical agent]

any chemical substance that affects the functioning of living things and the organisms that infect them. Pharmacology, the science of drugs, deals ... (22 of 1390 words, 3 images)


Collins Dictionary:

drug | drug on the market [sense-specific] | druggy [adjective, derived]

any synthetic, semisynthetic, or natural chemical substance used in the ... | a chemical substance, especially a narcotic, taken for the pleasant ... (21 of 974 words, 6 definitions, 13 usage examples, pronunciation)



drag [entry 1, noun] | drug [dialect, past tense] | pull [synonym, sense-specific] | street [synonym, sense-specific] | costume [synonym, sense-specific] | drag race [synonym, sense-specific] | harrow [synonym, sense-specific] | conveyance [synonym, sense-specific] | burden [synonym, sense-specific] | ...

something used to drag with ; especially, a device for dragging under water to detect or obtain objects | something that is dragged, pulled, or drawn ... (25 of 404 words, 8 definitions, 5 usage examples, pronunciation)


drug [entry 1, noun] | cure [synonym, sense-specific] | medicine [synonym, sense-specific] | medicament [synonym, sense-specific] | medication [synonym, sense-specific] | medicinal [synonym, sense-specific] | pharmaceutical [synonym, sense-specific] | physic [synonym, sense-specific] | remedy [synonym, sense-specific] | ...

[obsolete] a substance used in dyeing or chemical operations ; a substance ... | a commodity that is not salable or for which there is no demand [used ... (27 of 262 words, 3 definitions, pronunciations)


drug [entry 2, verb] | drugged [past tense] | drugging [present participle]

to affect with a drug ; especially, to stupefy by a narcotic drug | to administer a drug to | to lull or stupefy as if with a drug | to take drugs for ... (31 of 72 words, 4 definitions)

www​.merriam-webster​.com​/dictionary​/drug show=1

Oxford Dictionary:

drug | drugged [past tense] | drugging [present participle] | drugs [3rd-person singular present] | do drugs | on drugs

a medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body | a substance taken for its ... (23 of 183 words, 8 definitions, 8 usage examples, pronunciation)


Cambridge Dictionary:

drug [entry 1]

any natural or artificially made chemical which is used as a medicine (12 of 30 words, 4 usage examples, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/drug 1

drug [entry 2]

any natural or artificially made chemical which is taken for pleasure, to ... | any activity that you cannot stop doing (20 of 86 words, 2 definitions, 7 usage examples, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/drug 2

drug [entry 3] | -gg- [past tense]

to give someone or something a chemical which causes a loss of feeling or unconsciousness (15 of 70 words, 3 usage examples, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/drug 3

Encarta Dictionary:

controlled substance | controlled substances [plural]

a substance subject to statutory control, especially a drug that can be obtained legally only with a doctor's prescription (19 of 32 words)

encarta​.msn​.com​/dictionary 1861688286​/definition​.html  [offline]

Audio references

Macmillan British Dictionary:

controlled substance [countable, law] | controlled substances [plural]

Audio: British English pronunciation of "controlled substance"


Macmillan American Dictionary:

controlled substance [countable, law] | controlled substances [plural]

Audio: North American pronunciation of "controlled substance"


YourDictionary Audio:

controlled substance

Audio: North American English pronunciation of "controlled substance"


Page last updated: 2013-06-26

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