A livestock enclosure or corral without pasture where animals are kept and fed grain rather than allowed to graze.
From English 'dry' (lacking moisture or grass) combined with 'lot' (an area of land), referring to a bare or unpastured enclosure where cattle and sheep are confined and fed artificially.
Drylots became common when farming industrialized and people needed to control animal weight and breeding precisely—it's the farming equivalent of a confined space that lets you monitor exactly what an animal eats, which changed how modern beef and dairy production work.
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