A variant or dialectal form of 'aviary,' a large enclosure for keeping birds.
A dialectal or alternate spelling of 'aviary,' derived from Latin 'aviarium,' from 'avis' meaning 'bird.' The 'e-' beginning is a regional dialect variant.
The multiple spellings of 'aviary' (also 'ewry,' 'avery,' 'aery') show that standardized spelling is surprisingly recent—in medieval times, you could spell familiar words several different ways without it being considered a mistake.
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