Plural of facing: strips of fabric used to finish edges of garments, or the exterior surface of a building or structure.
From 'face' (Latin 'facies') + '-ing' (forming noun from verb) + '-s' (plural marker). Originally meant the action of facing something, then came to mean the materials used in facing garments or buildings.
Military uniforms often have brightly colored facings on cuffs and collars—this tradition started centuries ago as a way to identify regiments and has become iconic in formal dress uniforms worldwide.
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