ganja UK /ˈɡæn.dʒə/US /ˈɡɑn.d͡ʒə/ noun1 •Marijuana, the inflorescence of the Cannabis sativa plant, smoked or ingested for euphoric effect.In Bengal the natives talk of the ganja-bearing plant as the male and the weaker pollen-bearing plant as the female. — 1898 formsganjas