doped

1. 1
   adjective

   Affected by a drug, especially one given to sedate or stupefy.

   The boxer was doped before the fight to dull his reflexes.

   Security found the guard dogs doped and the warehouse emptied.

   Similardrugged, stupefied

   Oppositesober

2. 2
   verb

   Simple past and past participle of dope.

   The trainers doped the horses to improve their times.

   Investigators found that the drinks had been doped at the party.

   Note

   One spelling does the work of past tense and past participle for every meaning of the verb. Trainers doped horses and engineers doped silicon with arsenic. An athlete who doped took banned performance-enhancing drugs, with no object at all. A dated slang use meant predicted a result. After be, the passive can look like the drugged adjective, but adding by and an agent marks it as the verb.

3. 3
   adjective

   Of a semiconductor, having had small amounts of elements added to create charge carriers.

   Doped silicon forms the basis of nearly every modern transistor.

   Engineers compared the lightly doped and heavily doped regions of the wafer.

   Oppositeintrinsic, pure

   Note

   In electronics, the added element matters as much as the act. Silicon is doped with boron or with phosphorus, and that choice decides the result. Acceptor impurities such as boron create holes and give p-type material. Donor impurities such as phosphorus supply free electrons. The usual construction is doped with plus the element, and the dose is graded as lightly or heavily doped.

4. 4
   adjective

   Coated with dope, a glue- or paint-like liquid used to fill the pores and stiffen a surface.

   The doped wings of the biplane gleamed under fresh coats of varnish.

   Mechanics replaced the torn, doped covering on the aircraft's tail.

   Similarvarnished, coated, treated

   Note

   This word comes from the workshop of fabric-covered aircraft. Dope is a lacquer brushed onto taut cloth to fill the weave and shrink it tight, and doped fabric is the result. It almost always describes a covering: wings, tail surfaces, or an airship's skin, like the Hindenburg's, which was very flammable. Context keeps it apart from the drugged meaning, since a doped wing is coated, not sedated.

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