doped (Adjective) — Treated or impregnated with a foreign substance.
doped (Adjective) — Under the influence of narcotics. ex. "knocked out by doped wine"
doped (Verb) — Take drugs to improve one's athletic performance.
doped (Verb) — (electronics) add impurities to (a semiconductor) in order to produce or modify its properties. ex. "The resistors have been doped"
doped (Verb) — (medicine) give a narcotic to. ex. "The athletes were doped by the coach before the race"
doped (Verb) — To dip. ex. "Let's have a dop first"