G0257
ἅλων
threshing-floor
ἅλων, -ωνος (for Attic ἅλως, -ω, see MM, VGT, see word), ἡ, [in LXX chiefly for גֹּרֶן ;] a threshing floor: Mat.3:12, Luk.3:17 (here prob. by meton. = the grain on the threshing floor).† (AS)
Full Thayer's lexicon entry
ἅλων — hálōn
ἅλων, (ωνος, ἡ (in the Sept. also ὁ, cf. Rth 3:2; Job 39:12), equivalent to ἡ ἅλως, genitive ἅλω, a ground-plot or threshing-floor, i. e., a place in the field itself, made hard after the harvest by a roller, where the grain was threshed out: Mat 3:12; Luk 3:17. In both these passages, by metonymy of the container for the thing contained, ἅλων is the heap of grain, the flooring, already indeed threshed out, but still mixed with chaff and straw, like Hebrew גֹּרֶן, Rth 3:2; Job 39:12 (the Sept. in each place ἅλωνα); (others adhere to the primary meaning. Used by Aristotle, de vent. 3, Works, 2:973{a} 14).
2 occurrences
Matthew (1), Luke (1)