The parts of clothing that go around the neck, or devices fastened around an animal's neck.
From Old French 'colier' meaning necklace, derived from Latin 'collum' (neck). Originally referred to any necklace, then narrowed to the neck edge of garments.
The 'white-collar' vs 'blue-collar' class distinction is baked right into our language—factory workers wore dark shirts (blue-collar) while office workers wore white shirts with visible collars, and that word choice literally created a social category we still use today.
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