farm
Structures supporting a large agricultural operation, using a more specific agricultural usage where applicable.
A farm building is a structure which supports a large-scale agricultural operation. This is a general usage category, and whenever applicable a more specific usage such as barn or stable should be applied.
The agricultural operation gives the building its supporting purpose. It can house a necessary farm activity without itself being an area where crops are growing.
A barn or stable has a more particular agricultural function. A field or greenhouse used for growing crops is described by cultivation.
