| Noun | 1. | sorghum - economically important Old World tropical cereal grassmillet - any of various small-grained annual cereal and forage grasses of the genera Panicum, Echinochloa, Setaria, Sorghum, and Eleusine genus Sorghum - annual or perennial tropical and subtropical cereal grasses: sorghum grain sorghum - any of several sorghums cultivated primarily for grain | |