Boyd’s Bible Dictionary:
(thrashing). Done anciently by treading with oxen or horses, or by drawn sleds, sometimes spiked, on earthen floors, usually on high spots of ground (Deut. 25:4; 1 Chron. 21:15-28; Isa. 28:27-28; 41:15-16). The flail or stick is mentioned (Ruth 2:17).
Concise Bible Dictionary:
This is accomplished in the East by the grain being trodden on by oxen, and that it was so threshed in ancient times is shown by the law that the ox should not be muzzled that trod out the corn (Deut. 25:4). There were also threshing “instruments,” with which the grain was beaten out. Threshing was also accomplished by oxen drawing over the grain a sort of sledge without runners, by which the straw also was crushed (2 Sam. 24:22; Isa. 41:15).
Strong’s Dictionary of Hebrew Words:
Meaning:
(Aramaic) intensive, from a root corresponding to 142; ample, i.e. a threshing-floor
KJV Usage:
threshingflo or