A poultry pen or enclosure for holding birds; a fold for flitting birds.
Compound of 'flit' (to move quickly) and 'fold' (enclosure), referring to a pen where birds can flit about, though the exact historical usage is obscure.
Words like 'flitfold' show how English speakers compound words freely to describe specific things—by the time a term is written down in a dictionary, it might already be archaic, but the formation principle lives on in words like 'sheepfold,' 'pigpen,' and 'chicken coop.'
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