mass noun
1- a powder obtained by grinding grain, typically wheat, and used to make bread, cakes, and pastry谷物粉, 面粉。
1.1
- fine soft powder obtained by grinding the seeds or roots of starchy vegetables淀粉质植物籽（或根）磨成的粉：
manioc flour.
木薯粉。
with obj.
1- sprinkle (something, especially a work surface or cooking utensil) with a thin layer of flour撒粉于（尤指厨房操作台或炊具）。
1.1
- US grind (grain) into flour〈美〉把（谷物）磨成粉。
词源
Middle English: a specific use of FLOWER in the sense 'the best part', used originally to mean 'the finest quality of ground wheat'. The spelling flower remained in use alongside flour until the early 19th cent.