ˈdʌm.bɛl ˈdʌmi ɡeɪdʒ ɡɹɑːs ˈpɪn.hɛd give a narcotic to The athletes were doped by the coach before the race add impurities to (a semiconductor) in order to produce or modify its properties The resistors have been doped take drugs to improve one's athletic performance street names for marijuana slang terms for inside information is that the straight dope? carbonated drink flavored with extract from kola nuts an ignorant or foolish person