Meaning of “mill” - Learner’s Dictionary

mill

noun [ C ] uk us /mɪl/
FLOUR

a machine for crushing grain into flour, or a building with this machine:

a flour mill
POWDER

a small machine used in the kitchen for crushing things such as coffee beans into a powder:

a coffee/pepper mill
MATERIAL

a factory where one material or substance is made:

a paper/steel mill

(Definition of “mill noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)