noun, a field where hay is being or is to be made (COD)
“I mean, we went out in the hayfield or the grain fields … and milking cows … ”
“You’ve seen them, the yellow aircraft. The sky was full of those. You can’t believe it. And the thing — the kids don’t believe me — but they’d go cross the hayfield, and you’d see the prop wash on the top of the timothy.”