Definition of "owl"
noun:
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Any of various birds of prey of the order Strigiformes that are primarily nocturnal and have forward-looking, binocular vision, limited eye movement, and good hearing.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A person seen as having owl-like characteristics, especially appearing wise or serious, or being nocturnally active.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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