Correct the Terminology of Grid-based design

hi in the book Order disorder there is the vocabulary of the components of grid-based design and it says you have the building blocks of the columm are units than you place on top of the columms the region where you separate content will be placed its good to know this but in other books like Book design by Mueller and in "making and breaking the grid" there are more compoments mentioned like spatial zone, region and module so it comes in handy to know this stuff but it confuses me do you had also this problem to distinguish between spatial zone, region and module when creating a grid in web design? is spatial zone the module itself and module is the region? my problem is here that I cannot distinguish between modules regions and spatial zone, can someone correct me on this? thanks