WordReference Random House Learner's Dictionary of American English © 2019
dope /doʊp/USA pronunciation   n., v.,  doped, dop•ing, adj. 
  1. Drugs, Slang Terms[Slang.]a narcotic or illegal drug:[uncountable]He was on dope for years.
  2. Drugs, Slang Terms[uncountable][Slang.]a narcotic preparation given to a horse to improve or hold back its performance in a race.
  3. Slang Termsinformation;
    news:[uncountable]What's the latest dope?
  4. Informal Termsa stupid person:[countable]Tell those dopes to give you a raise.

  1. Drugs, Slang Terms[ often: be + ~-ed (+ up ) ][Slang.]to affect with dope or drugs:He was obviously doped (up), shouting and weaving down the street.
  2. to give dope to;
    treat with dope: [ (+ up ) + obj]:They had doped (up) the patient heavily before the operation.[ + obj (+ up ) ]:They doped the horse (up) and it easily won the race.
  3. Slang Termsdope out, to figure out: [+ out + object]I doped out most of the questions on the test.[+ object + out]I finally doped it out: we were a threat to him.[+ out +(that) clause]I finally doped out that I was being threatened.

WordReference Random House Unabridged Dictionary of American English © 2019
dope  (dōp),USA pronunciation n., v.,  doped, dop•ing. 
  1. any thick liquid or pasty preparation, as a lubricant, used in preparing a surface.
  2. an absorbent material used to absorb and hold a liquid, as in the manufacture of dynamite.
  3. Aeronautics
    • any of various varnishlike products for coating a fabric, as of airplane wings, in order to make it waterproof, stronger, etc.
    • a similar product used to coat the fabric of a balloon to reduce gas leakage.
  4. Drugs, Slang Terms[Slang.]
    • any narcotic or narcoticlike drug taken to induce euphoria or satisfy addiction.
    • any illicit drug.
  5. Drugs, Slang Terms[Slang.]a narcotic preparation given surreptitiously to a horse to improve or retard its performance in a race.
  6. Slang Termsinformation, data, or news:What's the latest dope on the strike?
  7. Informal Termsa stupid or unresponsive person.
  8. Dialect Terms[Southern U.S.](chiefly South Atlantic States) soda pop, esp. cola-flavored.
  9. Dialect Terms[North Central U.S.](chiefly Ohio). syrup used as a topping for ice cream.

  1. Drugs, Slang Terms[Slang.]to affect with dope or drugs.
  2. to apply or treat with dope.
  3. Electronicsto add or treat (a pure semiconductor) with a dopant.

  1. Drugs, Slang Terms[Slang.]to take drugs.
  2. dope out, [Slang.]
    • to figure out;
      devise:to dope out a plan.
    • to deduce or infer from available information:to dope out a solution to a problem.
  • Dutch doop (dialect, dialectal) sauce, derivative of dopen to dip
  • 1840–50, 1885–90 for def. 4, 1900–05 for def. 6
    8. See  soda pop. 

Collins Concise English Dictionary © HarperCollins Publishers::

dope /dəʊp/ n
  1. any of a number of preparations made by dissolving cellulose derivatives in a volatile solvent, applied to fabric in order to improve strength, tautness, etc
  2. an additive used to improve the properties of something, such as an antiknock compound added to petrol
  3. a thick liquid, such as a lubricant, applied to a surface
  4. a combustible absorbent material, such as sawdust or wood pulp, used to hold the nitroglycerine in dynamite
  5. slang any illegal drug, usually cannabis
  6. a drug administered to a racehorse or greyhound to affect its performance
  7. informal a person considered to be stupid or slow-witted
  8. informal news or facts, esp confidential information
vb (transitive)
  1. to add impurities to (a semiconductor) in order to produce or modify its properties
  2. to apply or add a dopant to
  3. to administer a drug to (oneself or another)
Etymology: 19th Century: from Dutch doop sauce, from doopen to dip

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