The amount of something that can fit in a bushel; as much as a bushel will hold.
Compound of 'bushel' and 'full', meaning the complete capacity of a bushel container. This construction follows the pattern of words like 'spoonful' and 'handful'.
A bushelful of apples is roughly 48 pounds—that's why the word exists, because people needed a quick way to talk about these standardized quantities in daily trade.
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