Threshing may be done by beating the grain using a flail on a threshing floor.
From the en.wikipedia.org
The reaper has driven him mainly from the harvest field, the thresher from the threshing-floor.
From the theatlantic.com
China was the threshing floor.
From the economist.com
She lay down on the threshing floor beside the wealthy Boaz as a way of claiming the right to marry him as a kinsman of her deceased husband.
From the al.com
By building the barns into hillsides, farmers could drive their wagons filled with hay and grain directly to the second-story threshing floor to unload.
From the mcall.com
Already in the 15th century it was usual to create a court in front of the house, with a well, separated from the farmyard with its barns, animals, and threshing-floor.