Definition of "Dope" :
noun: street names for marijuana
noun: slang terms for inside information
"Is that the straight dope?."
noun: carbonated drink flavored with extract from kola nuts (dope' is a southernism in the United States)
noun: an ignorant or foolish person
verb: give a narcotic to
"The athletes were dope by the coach before the race."
verb: add impurities to (a semiconductor) in order to produce or modify its properties
"The resistors have been doped."
verb: take drugs to improve one's athletic performance