n. 帽边缎带, 服丧时帽子上的黑带

[ noun ]
a band around the crown of a hat just above the brim
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Hatband \Hat"band`\ (h[a^]t"b[a^]nd`), n.
A band round the crown of a hat; sometimes, a band of black
cloth, crape, etc., worn as a badge of mourning.