grain /ɡrein/ n. ［u］ & ［c］ 1. 谷物，粮食: to produce grain 生产粮食; to waste grain 浪费粮食 2.［c］一粒，谷粒: a grain of rice 一粒米；a few grains of salt 几粒盐 3.［c］纹理: This kind of wood has a very fine grain. 这种木头纹理好。